diff --git a/glm/core/type_mat2x2.hpp b/glm/core/type_mat2x2.hpp
index e489d20bd..c13377b0d 100644
--- a/glm/core/type_mat2x2.hpp
+++ b/glm/core/type_mat2x2.hpp
@@ -207,6 +207,16 @@ 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 a89799f89..c7021c8e4 100644
--- a/glm/core/type_mat2x3.hpp
+++ b/glm/core/type_mat2x3.hpp
@@ -183,10 +183,20 @@ 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 be1537d49..081da489b 100644
--- a/glm/core/type_mat2x4.hpp
+++ b/glm/core/type_mat2x4.hpp
@@ -185,10 +185,20 @@ 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 564d9757b..feaa998e7 100644
--- a/glm/core/type_mat3x2.hpp
+++ b/glm/core/type_mat3x2.hpp
@@ -195,6 +195,16 @@ 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 a97c1c1b8..b77154101 100644
--- a/glm/core/type_mat3x3.hpp
+++ b/glm/core/type_mat3x3.hpp
@@ -210,6 +210,16 @@ 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 3441db411..bb620f301 100644
--- a/glm/core/type_mat3x4.hpp
+++ b/glm/core/type_mat3x4.hpp
@@ -195,6 +195,16 @@ 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 f4ae9980f..33e2a9576 100644
--- a/glm/core/type_mat4x2.hpp
+++ b/glm/core/type_mat4x2.hpp
@@ -196,9 +196,19 @@ 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 eca737677..5852fa31b 100644
--- a/glm/core/type_mat4x3.hpp
+++ b/glm/core/type_mat4x3.hpp
@@ -194,10 +194,20 @@ 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 376df3d2b..919e04e86 100644
--- a/glm/core/type_mat4x4.hpp
+++ b/glm/core/type_mat4x4.hpp
@@ -208,6 +208,16 @@ 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* (