diff --git a/glm/detail/setup.hpp b/glm/detail/setup.hpp
index 3f65eb44..18904f89 100644
--- a/glm/detail/setup.hpp
+++ b/glm/detail/setup.hpp
@@ -942,6 +942,12 @@
 #	define GLM_RELAXED_CONSTEXPR const
 #endif
 
+#ifdef GLM_IMPLICIT_CONVERSION_CTOR
+#	define GLM_EXPLICIT_CONV
+#else
+#	define GLM_EXPLICIT_CONV explicit
+#endif
+
 #ifdef GLM_FORCE_EXPLICIT_CTOR
 #	define GLM_EXPLICIT explicit
 #else
diff --git a/glm/detail/type_mat2x2.hpp b/glm/detail/type_mat2x2.hpp
index 9df68720..e9ef38dd 100644
--- a/glm/detail/type_mat2x2.hpp
+++ b/glm/detail/type_mat2x2.hpp
@@ -102,14 +102,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat2x2(tmat2x2<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat2x2(tmat3x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x2(tmat4x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x2(tmat2x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x2(tmat3x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x2(tmat2x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x2(tmat4x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x2(tmat3x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x2(tmat4x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x2(tmat3x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x2(tmat4x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x2(tmat2x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x2(tmat3x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x2(tmat2x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x2(tmat4x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x2(tmat3x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x2(tmat4x3<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_mat2x3.hpp b/glm/detail/type_mat2x3.hpp
index 493548f4..672ed717 100644
--- a/glm/detail/type_mat2x3.hpp
+++ b/glm/detail/type_mat2x3.hpp
@@ -99,14 +99,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat2x3(tmat2x3<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat2x3(tmat2x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x3(tmat3x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x3(tmat4x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x3(tmat2x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x3(tmat3x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x3(tmat3x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x3(tmat4x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x3(tmat4x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x3(tmat2x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x3(tmat3x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x3(tmat4x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x3(tmat2x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x3(tmat3x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x3(tmat3x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x3(tmat4x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x3(tmat4x3<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_mat2x4.hpp b/glm/detail/type_mat2x4.hpp
index e15714ca..e352efc3 100644
--- a/glm/detail/type_mat2x4.hpp
+++ b/glm/detail/type_mat2x4.hpp
@@ -101,14 +101,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat2x4(tmat2x4<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat2x4(tmat2x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x4(tmat3x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x4(tmat4x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x4(tmat2x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x4(tmat3x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x4(tmat3x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x4(tmat4x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat2x4(tmat4x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x4(tmat2x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x4(tmat3x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x4(tmat4x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x4(tmat2x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x4(tmat3x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x4(tmat3x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x4(tmat4x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat2x4(tmat4x3<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_mat3x2.hpp b/glm/detail/type_mat3x2.hpp
index 63e0a659..050cbc24 100644
--- a/glm/detail/type_mat3x2.hpp
+++ b/glm/detail/type_mat3x2.hpp
@@ -106,14 +106,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat3x2(tmat3x2<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat3x2(tmat2x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x2(tmat3x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x2(tmat4x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x2(tmat2x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x2(tmat2x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x2(tmat3x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x2(tmat4x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x2(tmat4x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x2(tmat2x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x2(tmat3x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x2(tmat4x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x2(tmat2x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x2(tmat2x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x2(tmat3x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x2(tmat4x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x2(tmat4x3<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_mat3x3.hpp b/glm/detail/type_mat3x3.hpp
index 799d645d..e9546421 100644
--- a/glm/detail/type_mat3x3.hpp
+++ b/glm/detail/type_mat3x3.hpp
@@ -110,14 +110,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat3x3(tmat3x3<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat3x3(tmat2x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x3(tmat4x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x3(tmat2x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x3(tmat3x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x3(tmat2x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x3(tmat4x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x3(tmat3x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x3(tmat4x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x3(tmat2x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x3(tmat4x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x3(tmat2x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x3(tmat3x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x3(tmat2x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x3(tmat4x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x3(tmat3x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x3(tmat4x3<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_mat3x4.hpp b/glm/detail/type_mat3x4.hpp
index 7453673b..63c16d19 100644
--- a/glm/detail/type_mat3x4.hpp
+++ b/glm/detail/type_mat3x4.hpp
@@ -106,14 +106,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat3x4(tmat3x4<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat3x4(tmat2x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x4(tmat3x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x4(tmat4x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x4(tmat2x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x4(tmat3x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x4(tmat2x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x4(tmat4x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat3x4(tmat4x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x4(tmat2x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x4(tmat3x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x4(tmat4x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x4(tmat2x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x4(tmat3x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x4(tmat2x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x4(tmat4x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat3x4(tmat4x3<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_mat4x2.hpp b/glm/detail/type_mat4x2.hpp
index 8cb7d70e..ebdbd085 100644
--- a/glm/detail/type_mat4x2.hpp
+++ b/glm/detail/type_mat4x2.hpp
@@ -111,14 +111,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat4x2(tmat4x2<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat4x2(tmat2x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x2(tmat3x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x2(tmat4x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x2(tmat2x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x2(tmat3x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x2(tmat2x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x2(tmat4x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x2(tmat3x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x2(tmat2x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x2(tmat3x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x2(tmat4x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x2(tmat2x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x2(tmat3x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x2(tmat2x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x2(tmat4x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x2(tmat3x4<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_mat4x3.hpp b/glm/detail/type_mat4x3.hpp
index 0a5de95b..3ff7c6e9 100644
--- a/glm/detail/type_mat4x3.hpp
+++ b/glm/detail/type_mat4x3.hpp
@@ -111,14 +111,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat4x3(tmat4x3<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat4x3(tmat2x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x3(tmat3x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x3(tmat4x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x3(tmat2x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x3(tmat3x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x3(tmat2x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x3(tmat4x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x3(tmat3x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x3(tmat2x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x3(tmat3x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x3(tmat4x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x3(tmat2x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x3(tmat3x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x3(tmat2x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x3(tmat4x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x3(tmat3x4<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_mat4x4.hpp b/glm/detail/type_mat4x4.hpp
index a90a5978..7fc04a41 100644
--- a/glm/detail/type_mat4x4.hpp
+++ b/glm/detail/type_mat4x4.hpp
@@ -115,14 +115,14 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tmat4x4(tmat4x4<U, Q> const & m);
 
-		GLM_FUNC_DECL explicit tmat4x4(tmat2x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x4(tmat3x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x4(tmat2x3<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x4(tmat3x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x4(tmat2x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x4(tmat4x2<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x4(tmat3x4<T, P> const & x);
-		GLM_FUNC_DECL explicit tmat4x4(tmat4x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x4(tmat2x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x4(tmat3x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x4(tmat2x3<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x4(tmat3x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x4(tmat2x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x4(tmat4x2<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x4(tmat3x4<T, P> const & x);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tmat4x4(tmat4x3<T, P> const & x);
 
 		// -- Accesses --
 
diff --git a/glm/detail/type_vec1.hpp b/glm/detail/type_vec1.hpp
index 833468d8..22f729b5 100644
--- a/glm/detail/type_vec1.hpp
+++ b/glm/detail/type_vec1.hpp
@@ -126,13 +126,13 @@ namespace glm
 
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
-		GLM_FUNC_DECL explicit tvec1(tvec2<U, Q> const & v);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec1(tvec2<U, Q> const & v);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
-		GLM_FUNC_DECL explicit tvec1(tvec3<U, Q> const & v);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec1(tvec3<U, Q> const & v);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
-		GLM_FUNC_DECL explicit tvec1(tvec4<U, Q> const & v);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec1(tvec4<U, Q> const & v);
 
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
diff --git a/glm/detail/type_vec2.hpp b/glm/detail/type_vec2.hpp
index 1d857ac7..1188ceb7 100644
--- a/glm/detail/type_vec2.hpp
+++ b/glm/detail/type_vec2.hpp
@@ -138,10 +138,10 @@ namespace glm
 
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
-		GLM_FUNC_DECL explicit tvec2(tvec3<U, Q> const & v);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec2(tvec3<U, Q> const & v);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
-		GLM_FUNC_DECL explicit tvec2(tvec4<U, Q> const & v);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec2(tvec4<U, Q> const & v);
 
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
diff --git a/glm/detail/type_vec3.hpp b/glm/detail/type_vec3.hpp
index d4d8ff6a..4e6ee1d7 100644
--- a/glm/detail/type_vec3.hpp
+++ b/glm/detail/type_vec3.hpp
@@ -143,19 +143,19 @@ namespace glm
 
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec3(tvec2<A, Q> const & a, B const & b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec3(tvec2<A, Q> const & a, B const & b);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec3(tvec2<A, Q> const & a, tvec1<B, Q> const & b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec3(tvec2<A, Q> const & a, tvec1<B, Q> const & b);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec3(A const & a, tvec2<B, Q> const & b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec3(A const & a, tvec2<B, Q> const & b);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec3(tvec1<A, Q> const & a, tvec2<B, Q> const & b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec3(tvec1<A, Q> const & a, tvec2<B, Q> const & b);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
-		GLM_FUNC_DECL explicit tvec3(tvec4<U, Q> const & v);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec3(tvec4<U, Q> const & v);
 
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
diff --git a/glm/detail/type_vec4.hpp b/glm/detail/type_vec4.hpp
index f26350c6..5a504455 100644
--- a/glm/detail/type_vec4.hpp
+++ b/glm/detail/type_vec4.hpp
@@ -208,37 +208,37 @@ namespace detail
 
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, typename C, precision Q>
-		GLM_FUNC_DECL explicit tvec4(tvec2<A, Q> const & a, B b, C c);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(tvec2<A, Q> const & a, B b, C c);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, typename C, precision Q>
-		GLM_FUNC_DECL explicit tvec4(tvec2<A, Q> const & a, tvec1<B, Q> const & b, tvec1<C, Q> const & c);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(tvec2<A, Q> const & a, tvec1<B, Q> const & b, tvec1<C, Q> const & c);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, typename C, precision Q>
-		GLM_FUNC_DECL explicit tvec4(A a, tvec2<B, Q> const & b, C c);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(A a, tvec2<B, Q> const & b, C c);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, typename C, precision Q>
-		GLM_FUNC_DECL explicit tvec4(tvec1<A, Q> const & a, tvec2<B, Q> const & b, tvec1<C, Q> const & c);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(tvec1<A, Q> const & a, tvec2<B, Q> const & b, tvec1<C, Q> const & c);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, typename C, precision Q>
-		GLM_FUNC_DECL explicit tvec4(A a, B b, tvec2<C, Q> const & c);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(A a, B b, tvec2<C, Q> const & c);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, typename C, precision Q>
-		GLM_FUNC_DECL explicit tvec4(tvec1<A, Q> const & a, tvec1<B, Q> const & b, tvec2<C, Q> const & c);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(tvec1<A, Q> const & a, tvec1<B, Q> const & b, tvec2<C, Q> const & c);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec4(tvec3<A, Q> const & a, B b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(tvec3<A, Q> const & a, B b);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec4(tvec3<A, Q> const & a, tvec1<B, Q> const & b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(tvec3<A, Q> const & a, tvec1<B, Q> const & b);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec4(A a, tvec3<B, Q> const & b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(A a, tvec3<B, Q> const & b);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec4(tvec1<A, Q> const & a, tvec3<B, Q> const & b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(tvec1<A, Q> const & a, tvec3<B, Q> const & b);
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, precision Q>
-		GLM_FUNC_DECL explicit tvec4(tvec2<A, Q> const & a, tvec2<B, Q> const & b);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tvec4(tvec2<A, Q> const & a, tvec2<B, Q> const & b);
 
 		/// Explicit conversions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename U, precision Q>
diff --git a/glm/gtc/quaternion.hpp b/glm/gtc/quaternion.hpp
index daf9cc19..b83e2cc2 100644
--- a/glm/gtc/quaternion.hpp
+++ b/glm/gtc/quaternion.hpp
@@ -144,12 +144,12 @@ namespace glm
 		/// @param v A second normalized axis
 		/// @see gtc_quaternion
 		/// @see http://lolengine.net/blog/2013/09/18/beautiful-maths-quaternion-from-vectors
-		GLM_FUNC_DECL explicit tquat(tvec3<T, P> const & u,	tvec3<T, P> const & v);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tquat(tvec3<T, P> const & u,	tvec3<T, P> const & v);
 
 		/// Build a quaternion from euler angles (pitch, yaw, roll), in radians.
-		GLM_FUNC_DECL explicit tquat(tvec3<T, P> const & eulerAngles);
-		GLM_FUNC_DECL explicit tquat(tmat3x3<T, P> const & m);
-		GLM_FUNC_DECL explicit tquat(tmat4x4<T, P> const & m);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tquat(tvec3<T, P> const & eulerAngles);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tquat(tmat3x3<T, P> const & m);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tquat(tmat4x4<T, P> const & m);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/gtx/dual_quaternion.hpp b/glm/gtx/dual_quaternion.hpp
index c62fcda4..4378c8ba 100644
--- a/glm/gtx/dual_quaternion.hpp
+++ b/glm/gtx/dual_quaternion.hpp
@@ -112,8 +112,8 @@ namespace glm
 		template <typename U, precision Q>
 		GLM_FUNC_DECL GLM_EXPLICIT tdualquat(tdualquat<U, Q> const & q);
 
-		GLM_FUNC_DECL explicit tdualquat(tmat2x4<T, P> const & holder_mat);
-		GLM_FUNC_DECL explicit tdualquat(tmat3x4<T, P> const & aug_mat);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tdualquat(tmat2x4<T, P> const & holder_mat);
+		GLM_FUNC_DECL GLM_EXPLICIT_CONV tdualquat(tmat3x4<T, P> const & aug_mat);
 
 		// -- Unary arithmetic operators --