diff --git a/glm/core/type_mat2x2.hpp b/glm/core/type_mat2x2.hpp
index 82092fc6..f122ea2c 100644
--- a/glm/core/type_mat2x2.hpp
+++ b/glm/core/type_mat2x2.hpp
@@ -187,6 +187,16 @@ namespace detail
 	tmat2x2<T> operator* (
 		tmat2x2<T> const & m1, 
 		tmat2x2<T> const & m2);
+		
+	template <typename T>
+	tmat3x2<T> operator* (
+		tmat2x2<T> const & m1, 
+		tmat3x2<T> const & m2);
+		
+	template <typename T>
+	tmat4x2<T> operator* (
+		tmat2x2<T> const & m1, 
+		tmat4x2<T> const & m2);
 
 	template <typename T> 
 	tmat2x2<T> operator/ (
diff --git a/glm/core/type_mat2x3.hpp b/glm/core/type_mat2x3.hpp
index caf3bea5..4ed11203 100644
--- a/glm/core/type_mat2x3.hpp
+++ b/glm/core/type_mat2x3.hpp
@@ -164,10 +164,20 @@ namespace detail
 		typename tmat2x3<T>::col_type const & v, 
 		tmat2x3<T> const & m);
 
+	template <typename T>
+	tmat2x3<T> operator* (
+		tmat2x3<T> const & m1, 
+		tmat2x2<T> const & m2);
+
 	template <typename T>
 	tmat3x3<T> operator* (
 		tmat2x3<T> const & m1, 
 		tmat3x2<T> const & m2);
+		
+	template <typename T>
+	tmat4x3<T> operator* (
+		tmat2x3<T> const & m1, 
+		tmat4x2<T> const & m2);
 
 	template <typename T> 
 	tmat2x3<T> operator/ (
diff --git a/glm/core/type_mat2x4.hpp b/glm/core/type_mat2x4.hpp
index c14dea0f..3f649c25 100644
--- a/glm/core/type_mat2x4.hpp
+++ b/glm/core/type_mat2x4.hpp
@@ -165,10 +165,20 @@ namespace detail
 		typename tmat2x4<T>::col_type const & v, 
 		tmat2x4<T> const & m);
 
+	template <typename T>
+	tmat4x4<T> operator* (
+		tmat2x4<T> const & m1, 
+		tmat4x2<T> const & m2);
+		
 	template <typename T>
 	tmat2x4<T> operator* (
 		tmat2x4<T> const & m1, 
-		tmat2x4<T> const & m2);
+		tmat2x2<T> const & m2);
+		
+	template <typename T>
+	tmat3x4<T> operator* (
+		tmat2x4<T> const & m1, 
+		tmat3x2<T> const & m2);
 
 	template <typename T> 
 	tmat2x4<T> operator/ (
diff --git a/glm/core/type_mat3x2.hpp b/glm/core/type_mat3x2.hpp
index bcfe9eb0..9acb1934 100644
--- a/glm/core/type_mat3x2.hpp
+++ b/glm/core/type_mat3x2.hpp
@@ -175,6 +175,16 @@ namespace detail
 	tmat2x2<T> operator* (
 		tmat3x2<T> const & m1, 
 		tmat2x3<T> const & m2);
+		
+	template <typename T>
+	tmat3x2<T> operator* (
+		tmat3x2<T> const & m1, 
+		tmat3x3<T> const & m2);
+		
+	template <typename T>
+	tmat4x2<T> operator* (
+		tmat3x2<T> const & m1, 
+		tmat4x3<T> const & m2);
 
 	template <typename T> 
 	tmat3x2<T> operator/ (
diff --git a/glm/core/type_mat3x3.hpp b/glm/core/type_mat3x3.hpp
index 50965d8d..d64f0f74 100644
--- a/glm/core/type_mat3x3.hpp
+++ b/glm/core/type_mat3x3.hpp
@@ -190,6 +190,16 @@ namespace detail
 	tmat3x3<T> operator* (
 		tmat3x3<T> const & m1, 
 		tmat3x3<T> const & m2);
+		
+	template <typename T>
+	tmat2x3<T> operator* (
+		tmat3x3<T> const & m1, 
+		tmat2x3<T> const & m2);
+		
+	template <typename T>
+	tmat4x3<T> operator* (
+		tmat3x3<T> const & m1, 
+		tmat4x3<T> const & m2);
 
 	template <typename T> 
 	tmat3x3<T> operator/ (
diff --git a/glm/core/type_mat3x4.hpp b/glm/core/type_mat3x4.hpp
index a60d9a56..0ad2c734 100644
--- a/glm/core/type_mat3x4.hpp
+++ b/glm/core/type_mat3x4.hpp
@@ -175,6 +175,16 @@ namespace detail
 	tmat4x4<T> operator* (
 		tmat3x4<T> const & m1, 
 		tmat4x3<T> const & m2);
+		
+	template <typename T>
+	tmat2x4<T> operator* (
+		tmat3x4<T> const & m1, 
+		tmat2x3<T> const & m2);
+		
+	template <typename T>
+	tmat3x4<T> operator* (
+		tmat3x4<T> const & m1, 
+		tmat3x3<T> const & m2);
 
 	template <typename T> 
 	tmat3x4<T> operator/ (
diff --git a/glm/core/type_mat4x2.hpp b/glm/core/type_mat4x2.hpp
index 0b003aa0..9eb284fa 100644
--- a/glm/core/type_mat4x2.hpp
+++ b/glm/core/type_mat4x2.hpp
@@ -176,9 +176,19 @@ namespace detail
 		typename tmat4x2<T>::col_type const & v, 
 		tmat4x2<T> const & m);
 
-	template <typename T> 
-	tmat2x2<T> operator* (
+	template <typename T>
+	tmat3x2<T> operator* (
 		tmat4x2<T> const & m1, 
+		tmat3x4<T> const & m2);
+		
+	template <typename T>
+	tmat4x2<T> operator* (
+		tmat4x2<T> const & m1, 
+		tmat4x4<T> const & m2);
+		
+	template <typename T>
+	tmat2x3<T> operator* (
+		tmat4x3<T> const & m1, 
 		tmat2x4<T> const & m2);
 
 	template <typename T> 
diff --git a/glm/core/type_mat4x3.hpp b/glm/core/type_mat4x3.hpp
index 1f295160..2cf59a9b 100644
--- a/glm/core/type_mat4x3.hpp
+++ b/glm/core/type_mat4x3.hpp
@@ -174,10 +174,20 @@ namespace detail
 		typename tmat4x3<T>::col_type const & v, 
 		tmat4x3<T> const & m);
 
+	template <typename T> 
+	tmat2x3<T> operator* (
+		tmat4x3<T> const & m1, 
+		tmat2x4<T> const & m2);
+
 	template <typename T> 
 	tmat3x3<T> operator* (
 		tmat4x3<T> const & m1, 
 		tmat3x4<T> const & m2);
+		
+	template <typename T>
+	tmat4x3<T> operator* (
+		tmat4x3<T> const & m1, 
+		tmat4x4<T> const & m2);
 
 	template <typename T> 
 	tmat4x3<T> operator/ (
diff --git a/glm/core/type_mat4x4.hpp b/glm/core/type_mat4x4.hpp
index 705ce8c2..9ce24001 100644
--- a/glm/core/type_mat4x4.hpp
+++ b/glm/core/type_mat4x4.hpp
@@ -188,6 +188,16 @@ namespace detail
 	typename tmat4x4<T>::row_type operator* (
 		typename tmat4x4<T>::col_type const & v, 
 		tmat4x4<T> const & m);
+		
+	template <typename T>
+	tmat2x4<T> operator* (
+		tmat4x4<T> const & m1, 
+		tmat2x4<T> const & m2);
+
+	template <typename T>
+	tmat3x4<T> operator* (
+		tmat4x4<T> const & m1, 
+		tmat3x4<T> const & m2);
 
 	template <typename T> 
 	tmat4x4<T> operator* (