diff --git a/glm/detail/func_geometric.hpp b/glm/detail/func_geometric.hpp
index 5bbb079e..784ada77 100644
--- a/glm/detail/func_geometric.hpp
+++ b/glm/detail/func_geometric.hpp
@@ -130,7 +130,7 @@ namespace glm
 	GLM_FUNC_DECL vecType<T, P> refract(
 		vecType<T, P> const & I,
 		vecType<T, P> const & N,
-		T const & eta);
+		T eta);
 
 	/// @}
 }//namespace glm
diff --git a/glm/detail/func_geometric.inl b/glm/detail/func_geometric.inl
index fd513990..462c2d26 100644
--- a/glm/detail/func_geometric.inl
+++ b/glm/detail/func_geometric.inl
@@ -183,7 +183,7 @@ namespace detail
 	}
 
 	template <typename T, precision P, template <typename, precision> class vecType>
-	GLM_FUNC_QUALIFIER vecType<T, P> refract(vecType<T, P> const & I, vecType<T, P> const & N, T const & eta)
+	GLM_FUNC_QUALIFIER vecType<T, P> refract(vecType<T, P> const & I, vecType<T, P> const & N, T eta)
 	{
 		GLM_STATIC_ASSERT(std::numeric_limits<T>::is_iec559, "'refract' only accept floating-point inputs");
 
diff --git a/glm/detail/func_packing.hpp b/glm/detail/func_packing.hpp
index 98c639e7..aa08f5ac 100644
--- a/glm/detail/func_packing.hpp
+++ b/glm/detail/func_packing.hpp
@@ -26,6 +26,7 @@
 /// @author Christophe Riccio
 ///
 /// @see <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.4 Floating-Point Pack and Unpack Functions</a>
+/// @see gtc_packing
 /// 
 /// @defgroup core_func_packing Floating-Point Pack and Unpack Functions
 /// @ingroup core
diff --git a/glm/gtc/type_ptr.hpp b/glm/gtc/type_ptr.hpp
index 4f1463df..c96e01ff 100644
--- a/glm/gtc/type_ptr.hpp
+++ b/glm/gtc/type_ptr.hpp
@@ -136,8 +136,7 @@ namespace glm
 	/// Build a matrix from a pointer.
 	/// @see gtc_type_ptr
 	template<typename T>
-	GLM_FUNC_DECL tmat4x2<T, defaultp> make_mat4x2(
-		T const * const ptr);
+	GLM_FUNC_DECL tmat4x2<T, defaultp> make_mat4x2(T const * const ptr);
 
 	/// Build a matrix from a pointer.
 	/// @see gtc_type_ptr