diff --git a/glm/gtc/matrix_transform.hpp b/glm/gtc/matrix_transform.hpp
index 952ac4ed..83f22b0d 100644
--- a/glm/gtc/matrix_transform.hpp
+++ b/glm/gtc/matrix_transform.hpp
@@ -100,7 +100,7 @@ namespace glm
 	template <typename T, precision P>
 	GLM_FUNC_DECL tmat4x4<T, P> rotate(
 		tmat4x4<T, P> const & m,
-		T const & angle,
+		T angle,
 		tvec3<T, P> const & axis);
 
 	/// Builds a scale 4 * 4 matrix created from 3 scalars. 
@@ -131,12 +131,12 @@ namespace glm
 	/// @see - glm::ortho(T const & left, T const & right, T const & bottom, T const & top)
 	template <typename T>
 	GLM_FUNC_DECL tmat4x4<T, defaultp> ortho(
-		T const & left,
-		T const & right,
-		T const & bottom,
-		T const & top,
-		T const & zNear,
-		T const & zFar);
+		T left,
+		T right,
+		T bottom,
+		T top,
+		T zNear,
+		T zFar);
 
 	/// Creates a matrix for projecting two-dimensional coordinates onto the screen.
 	/// 
@@ -149,10 +149,10 @@ namespace glm
 	/// @see - glm::ortho(T const & left, T const & right, T const & bottom, T const & top, T const & zNear, T const & zFar)
 	template <typename T>
 	GLM_FUNC_DECL tmat4x4<T, defaultp> ortho(
-		T const & left,
-		T const & right,
-		T const & bottom,
-		T const & top);
+		T left,
+		T right,
+		T bottom,
+		T top);
 
 	/// Creates a frustum matrix.
 	/// 
@@ -166,12 +166,12 @@ namespace glm
 	/// @see gtc_matrix_transform
 	template <typename T>
 	GLM_FUNC_DECL tmat4x4<T, defaultp> frustum(
-		T const & left,
-		T const & right,
-		T const & bottom,
-		T const & top,
-		T const & near,
-		T const & far);
+		T left,
+		T right,
+		T bottom,
+		T top,
+		T near,
+		T far);
 
 	/// Creates a matrix for a symetric perspective-view frustum.
 	/// 
@@ -183,10 +183,10 @@ namespace glm
 	/// @see gtc_matrix_transform
 	template <typename T>
 	GLM_FUNC_DECL tmat4x4<T, defaultp> perspective(
-		T const & fovy,
-		T const & aspect,
-		T const & near,
-		T const & far);
+		T fovy,
+		T aspect,
+		T near,
+		T far);
 
 	/// Builds a perspective projection matrix based on a field of view.
 	/// 
@@ -199,11 +199,11 @@ namespace glm
 	/// @see gtc_matrix_transform
 	template <typename T>
 	GLM_FUNC_DECL tmat4x4<T, defaultp> perspectiveFov(
-		T const & fov,
-		T const & width,
-		T const & height,
-		T const & near,
-		T const & far);
+		T fov,
+		T width,
+		T height,
+		T near,
+		T far);
 
 	/// Creates a matrix for a symmetric perspective-view frustum with far plane at infinite.
 	/// 
diff --git a/glm/gtc/matrix_transform.inl b/glm/gtc/matrix_transform.inl
index 4c8ac722..fa8d3e34 100644
--- a/glm/gtc/matrix_transform.inl
+++ b/glm/gtc/matrix_transform.inl
@@ -48,7 +48,7 @@ namespace glm
 	GLM_FUNC_QUALIFIER tmat4x4<T, P> rotate
 	(
 		tmat4x4<T, P> const & m,
-		T const & angle,
+		T angle,
 		tvec3<T, P> const & v
 	)
 	{
@@ -84,7 +84,7 @@ namespace glm
 	GLM_FUNC_QUALIFIER tmat4x4<T, P> rotate_slow
 	(
 		tmat4x4<T, P> const & m,
-		T const & angle, 
+		T angle, 
 		tvec3<T, P> const & v
 	)
 	{
@@ -146,12 +146,12 @@ namespace glm
 	template <typename T>
 	GLM_FUNC_QUALIFIER tmat4x4<T, defaultp> ortho
 	(
-		T const & left,
-		T const & right,
-		T const & bottom,
-		T const & top,
-		T const & zNear,
-		T const & zFar
+		T left,
+		T right,
+		T bottom,
+		T top,
+		T zNear,
+		T zFar
 	)
 	{
 		tmat4x4<T, defaultp> Result(1);
@@ -167,10 +167,10 @@ namespace glm
 	template <typename T>
 	GLM_FUNC_QUALIFIER tmat4x4<T, defaultp> ortho
 	(
-		T const & left,
-		T const & right,
-		T const & bottom,
-		T const & top
+		T left,
+		T right,
+		T bottom,
+		T top
 	)
 	{
 		tmat4x4<T, defaultp> Result(1);
@@ -185,12 +185,12 @@ namespace glm
 	template <typename T>
 	GLM_FUNC_QUALIFIER tmat4x4<T, defaultp> frustum
 	(
-		T const & left,
-		T const & right,
-		T const & bottom,
-		T const & top,
-		T const & nearVal,
-		T const & farVal
+		T left,
+		T right,
+		T bottom,
+		T top,
+		T nearVal,
+		T farVal
 	)
 	{
 		tmat4x4<T, defaultp> Result(0);
@@ -207,10 +207,10 @@ namespace glm
 	template <typename T>
 	GLM_FUNC_QUALIFIER tmat4x4<T, defaultp> perspective
 	(
-		T const & fovy,
-		T const & aspect,
-		T const & zNear,
-		T const & zFar
+		T fovy,
+		T aspect,
+		T zNear,
+		T zFar
 	)
 	{
 		assert(aspect != static_cast<T>(0));
@@ -230,11 +230,11 @@ namespace glm
 	template <typename T>
 	GLM_FUNC_QUALIFIER tmat4x4<T, defaultp> perspectiveFov
 	(
-		T const & fov,
-		T const & width,
-		T const & height,
-		T const & zNear,
-		T const & zFar
+		T fov,
+		T width,
+		T height,
+		T zNear,
+		T zFar
 	)
 	{
 		assert(width > static_cast<T>(0));