diff --git a/glm/detail/type_vec4.hpp b/glm/detail/type_vec4.hpp
index 4cd69dcd..5a03cd47 100644
--- a/glm/detail/type_vec4.hpp
+++ b/glm/detail/type_vec4.hpp
@@ -101,7 +101,7 @@ namespace glm
 
 		/// Explicit converions (From section 5.4.1 Conversion and scalar constructors of GLSL 1.30.08 specification)
 		template <typename A, typename B, typename C, typename D>
-		GLM_FUNC_DECL GLM_CONSTEXPR tvec4(A a, B b, C c, D d);
+		GLM_FUNC_DECL GLM_CONSTEXPR_SIMD tvec4(A a, B b, C c, D d);
 		template <typename A, typename B, typename C, typename D>
 		GLM_FUNC_DECL GLM_CONSTEXPR tvec4(tvec1<A, P> const& a, tvec1<B, P> const& b, tvec1<C, P> const& c, tvec1<D, P> const& d);
 
diff --git a/glm/detail/type_vec4.inl b/glm/detail/type_vec4.inl
index d7bbf386..496da9d6 100644
--- a/glm/detail/type_vec4.inl
+++ b/glm/detail/type_vec4.inl
@@ -196,7 +196,7 @@ namespace detail
 
 	template <typename T, precision P>
 	template <typename A, typename B, typename C, typename D>
-	GLM_FUNC_QUALIFIER GLM_CONSTEXPR tvec4<T, P>::tvec4(A a, B b, C c, D d) :
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_SIMD tvec4<T, P>::tvec4(A a, B b, C c, D d) :
 		x(static_cast<T>(a)),
 		y(static_cast<T>(b)),
 		z(static_cast<T>(c)),
diff --git a/glm/detail/type_vec4_simd.inl b/glm/detail/type_vec4_simd.inl
index 6ae818f5..55db422e 100644
--- a/glm/detail/type_vec4_simd.inl
+++ b/glm/detail/type_vec4_simd.inl
@@ -458,7 +458,7 @@ namespace detail
 	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_SIMD tvec4<int32, aligned_highp>::tvec4(int32 a, int32 b, int32 c, int32 d) :
 		data(_mm_set_epi32(d, c, b, a))
 	{}
-/*
+
 	template <>
 	template <>
 	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_SIMD tvec4<float, aligned_lowp>::tvec4(int32 a, int32 b, int32 c, int32 d) :
@@ -476,7 +476,6 @@ namespace detail
 	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_SIMD tvec4<float, aligned_highp>::tvec4(int32 a, int32 b, int32 c, int32 d) :
 		data(_mm_castsi128_ps(_mm_set_epi32(d, c, b, a)))
 	{}
-*/
 }//namespace glm
 
 #endif//GLM_ARCH & GLM_ARCH_SSE2_BIT
diff --git a/readme.md b/readme.md
index e1222046..1952d2d3 100644
--- a/readme.md
+++ b/readme.md
@@ -71,7 +71,8 @@ glm::mat4 camera(float Translate, glm::vec2 const & Rotate)
 #### [GLM 0.9.8.1](https://github.com/g-truc/glm/tree/0.9.8) - 2016-XX-XX
 ##### Fixes:
 - Fixed GCC warning filtering, replaced -pedantic by -Wpedantic
-- Fixed SIMD faceforward bug. #549 
+- Fixed SIMD faceforward bug. #549
+- Fixed GCC 4.8 with C++11 compilation option #550
 
 #### [GLM 0.9.8.0](https://github.com/g-truc/glm/releases/tag/0.9.8.0) - 2016-09-11
 ##### Features: