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diff --git a/external/include/glm/gtx/orthonormalize.hpp b/external/include/glm/gtx/orthonormalize.hpp
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+++ b/external/include/glm/gtx/orthonormalize.hpp
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+/// @ref gtx_orthonormalize
+/// @file glm/gtx/orthonormalize.hpp
+///
+/// @see core (dependence)
+/// @see gtx_extented_min_max (dependence)
+///
+/// @defgroup gtx_orthonormalize GLM_GTX_orthonormalize
+/// @ingroup gtx
+///
+/// @brief Orthonormalize matrices.
+///
+/// <glm/gtx/orthonormalize.hpp> need to be included to use these functionalities.
+
+#pragma once
+
+// Dependency:
+#include "../vec3.hpp"
+#include "../mat3x3.hpp"
+#include "../geometric.hpp"
+
+#if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_GTX_orthonormalize extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup gtx_orthonormalize
+	/// @{
+
+	/// Returns the orthonormalized matrix of m.
+	///
+	/// @see gtx_orthonormalize
+	template <typename T, precision P> 
+	GLM_FUNC_DECL tmat3x3<T, P> orthonormalize(tmat3x3<T, P> const & m);
+		
+	/// Orthonormalizes x according y.
+	///
+	/// @see gtx_orthonormalize
+	template <typename T, precision P> 
+	GLM_FUNC_DECL tvec3<T, P> orthonormalize(tvec3<T, P> const & x, tvec3<T, P> const & y);
+
+	/// @}
+}//namespace glm
+
+#include "orthonormalize.inl"