diff --git a/glm/core/type_mat2x3.hpp b/glm/core/type_mat2x3.hpp
index 02d7f4fc5..0acd7a413 100644
--- a/glm/core/type_mat2x3.hpp
+++ b/glm/core/type_mat2x3.hpp
@@ -125,8 +125,6 @@ namespace detail
 		template <typename U> 
 		GLM_FUNC_DECL tmat2x3<T, P> & operator*= (U s);
 		template <typename U> 
-		GLM_FUNC_DECL tmat2x3<T, P> & operator*= (tmat2x3<U, P> const & m);
-		template <typename U> 
 		GLM_FUNC_DECL tmat2x3<T, P> & operator/= (U s);
 
 		//////////////////////////////////////
diff --git a/glm/core/type_mat2x3.inl b/glm/core/type_mat2x3.inl
index d2ad0c659..56b441df3 100644
--- a/glm/core/type_mat2x3.inl
+++ b/glm/core/type_mat2x3.inl
@@ -339,13 +339,6 @@ namespace detail
 		return *this;
 	}
 
-	template <typename T, precision P> 
-	template <typename U> 
-	GLM_FUNC_QUALIFIER tmat2x3<T, P> & tmat2x3<T, P>::operator*= (tmat2x3<U, P> const & m)
-	{
-		return (*this = tmat2x3<U, P>(*this * m));
-	}
-
 	template <typename T, precision P>
 	template <typename U> 
 	GLM_FUNC_QUALIFIER tmat2x3<T, P> & tmat2x3<T, P>::operator/= (U s)
diff --git a/glm/core/type_mat2x4.hpp b/glm/core/type_mat2x4.hpp
index d3608daca..db68e435f 100644
--- a/glm/core/type_mat2x4.hpp
+++ b/glm/core/type_mat2x4.hpp
@@ -127,8 +127,6 @@ namespace detail
 		template <typename U> 
 		GLM_FUNC_DECL tmat2x4<T, P>& operator*= (U s);
 		template <typename U> 
-		GLM_FUNC_DECL tmat2x4<T, P>& operator*= (tmat2x4<U, P> const & m);
-		template <typename U> 
 		GLM_FUNC_DECL tmat2x4<T, P>& operator/= (U s);
 
 		//////////////////////////////////////
diff --git a/glm/core/type_mat2x4.inl b/glm/core/type_mat2x4.inl
index 96543cc9b..133fceeea 100644
--- a/glm/core/type_mat2x4.inl
+++ b/glm/core/type_mat2x4.inl
@@ -342,13 +342,6 @@ namespace detail
 		return *this;
 	}
 
-	template <typename T, precision P>
-	template <typename U>
-	GLM_FUNC_QUALIFIER tmat2x4<T, P>& tmat2x4<T, P>::operator*= (tmat2x4<U, P> const & m)
-	{
-		return (*this = tmat2x4<T, P>(*this * m));
-	}
-
 	template <typename T, precision P>
 	template <typename U>
 	GLM_FUNC_QUALIFIER tmat2x4<T, P> & tmat2x4<T, P>::operator/= (U s)
diff --git a/glm/core/type_mat3x2.hpp b/glm/core/type_mat3x2.hpp
index d4f78d04b..876f4bc68 100644
--- a/glm/core/type_mat3x2.hpp
+++ b/glm/core/type_mat3x2.hpp
@@ -131,8 +131,6 @@ namespace detail
 		template <typename U> 
 		GLM_FUNC_DECL tmat3x2<T, P> & operator*= (U s);
 		template <typename U> 
-		GLM_FUNC_DECL tmat3x2<T, P> & operator*= (tmat3x2<U, P> const & m);
-		template <typename U> 
 		GLM_FUNC_DECL tmat3x2<T, P> & operator/= (U s);
 
 		//////////////////////////////////////
diff --git a/glm/core/type_mat3x2.inl b/glm/core/type_mat3x2.inl
index 2d9929554..05541b48d 100644
--- a/glm/core/type_mat3x2.inl
+++ b/glm/core/type_mat3x2.inl
@@ -369,13 +369,6 @@ namespace detail
 		return *this;
 	}
 
-	template <typename T, precision P>
-	template <typename U>
-	GLM_FUNC_QUALIFIER tmat3x2<T, P>& tmat3x2<T, P>::operator*= (tmat3x2<U, P> const & m)
-	{
-		return (*this = tmat3x2<T, P>(*this * m));
-	}
-
 	template <typename T, precision P>
 	template <typename U>
 	GLM_FUNC_QUALIFIER tmat3x2<T, P> & tmat3x2<T, P>::operator/= (U s)
diff --git a/glm/core/type_mat3x4.hpp b/glm/core/type_mat3x4.hpp
index 0d16a51a6..6f73da249 100644
--- a/glm/core/type_mat3x4.hpp
+++ b/glm/core/type_mat3x4.hpp
@@ -131,8 +131,6 @@ namespace detail
 		template <typename U> 
 		GLM_FUNC_DECL tmat3x4<T, P> & operator*= (U s);
 		template <typename U> 
-		GLM_FUNC_DECL tmat3x4<T, P> & operator*= (tmat3x4<U, P> const & m);
-		template <typename U> 
 		GLM_FUNC_DECL tmat3x4<T, P> & operator/= (U s);
 
 		//////////////////////////////////////
diff --git a/glm/core/type_mat3x4.inl b/glm/core/type_mat3x4.inl
index 0186fc5d2..b5165e866 100644
--- a/glm/core/type_mat3x4.inl
+++ b/glm/core/type_mat3x4.inl
@@ -368,13 +368,6 @@ namespace detail
 		return *this;
 	}
 
-	template <typename T, precision P>
-	template <typename U>
-	GLM_FUNC_QUALIFIER tmat3x4<T, P>& tmat3x4<T, P>::operator*= (tmat3x4<U, P> const & m)
-	{
-		return (*this = tmat3x4<T, P>(*this * m));
-	}
-
 	template <typename T, precision P>
 	template <typename U>
 	GLM_FUNC_QUALIFIER tmat3x4<T, P> & tmat3x4<T, P>::operator/= (U s)
diff --git a/glm/core/type_mat4x2.hpp b/glm/core/type_mat4x2.hpp
index 002503898..6cf74f2dc 100644
--- a/glm/core/type_mat4x2.hpp
+++ b/glm/core/type_mat4x2.hpp
@@ -136,8 +136,6 @@ namespace detail
 		template <typename U> 
 		GLM_FUNC_DECL tmat4x2<T, P>& operator*= (U s);
 		template <typename U> 
-		GLM_FUNC_DECL tmat4x2<T, P>& operator*= (tmat4x2<U, P> const & m);
-		template <typename U> 
 		GLM_FUNC_DECL tmat4x2<T, P>& operator/= (U s);
 
 		//////////////////////////////////////
diff --git a/glm/core/type_mat4x2.inl b/glm/core/type_mat4x2.inl
index 6b3e8120f..aa897dc7a 100644
--- a/glm/core/type_mat4x2.inl
+++ b/glm/core/type_mat4x2.inl
@@ -401,13 +401,6 @@ namespace detail
 		return *this;
 	}
 
-	template <typename T, precision P>
-	template <typename U>
-	GLM_FUNC_QUALIFIER tmat4x2<T, P> & tmat4x2<T, P>::operator*= (tmat4x2<U, P> const & m)
-	{
-		return (*this = tmat4x2<T, P>(*this * m));
-	}
-
 	template <typename T, precision P>
 	template <typename U>
 	GLM_FUNC_QUALIFIER tmat4x2<T, P> & tmat4x2<T, P>::operator/= (U s)
diff --git a/glm/core/type_mat4x3.hpp b/glm/core/type_mat4x3.hpp
index 76e71c7d9..976572456 100644
--- a/glm/core/type_mat4x3.hpp
+++ b/glm/core/type_mat4x3.hpp
@@ -136,8 +136,6 @@ namespace detail
 		template <typename U>
 		GLM_FUNC_DECL tmat4x3<T, P> & operator*= (U s);
 		template <typename U>
-		GLM_FUNC_DECL tmat4x3<T, P> & operator*= (tmat4x3<U, P> const & m);
-		template <typename U>
 		GLM_FUNC_DECL tmat4x3<T, P> & operator/= (U s);
 
 		//////////////////////////////////////
diff --git a/glm/core/type_mat4x3.inl b/glm/core/type_mat4x3.inl
index d43ebfcf0..3de9aebe3 100644
--- a/glm/core/type_mat4x3.inl
+++ b/glm/core/type_mat4x3.inl
@@ -401,13 +401,6 @@ namespace detail
 		return *this;
 	}
 
-	template <typename T, precision P>
-	template <typename U>
-	GLM_FUNC_QUALIFIER tmat4x3<T, P> & tmat4x3<T, P>::operator*= (tmat4x3<U, P> const & m)
-	{
-		return (*this = tmat4x3<T, P>(*this * m));
-	}
-
 	template <typename T, precision P>
 	template <typename U>
 	GLM_FUNC_QUALIFIER tmat4x3<T, P> & tmat4x3<T, P>::operator/= (U s)