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diff --git a/src/include/glm/ext/scalar_integer.hpp b/src/include/glm/ext/scalar_integer.hpp
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+++ b/src/include/glm/ext/scalar_integer.hpp
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+/// @ref ext_scalar_integer
+/// @file glm/ext/scalar_integer.hpp
+///
+/// @see core (dependence)
+///
+/// @defgroup ext_scalar_integer GLM_EXT_scalar_integer
+/// @ingroup ext
+///
+/// Include <glm/ext/scalar_integer.hpp> to use the features of this extension.
+
+#pragma once
+
+// Dependencies
+#include "../detail/setup.hpp"
+#include "../detail/qualifier.hpp"
+#include "../detail/_vectorize.hpp"
+#include "../detail/type_float.hpp"
+#include "../vector_relational.hpp"
+#include "../common.hpp"
+#include <limits>
+
+#if GLM_MESSAGES == GLM_ENABLE && !defined(GLM_EXT_INCLUDED)
+#	pragma message("GLM: GLM_EXT_scalar_integer extension included")
+#endif
+
+namespace glm
+{
+	/// @addtogroup ext_scalar_integer
+	/// @{
+
+	/// Return true if the value is a power of two number.
+	///
+	/// @see ext_scalar_integer
+	template<typename genIUType>
+	GLM_FUNC_DECL bool isPowerOfTwo(genIUType v);
+
+	/// Return the power of two number which value is just higher the input value,
+	/// round up to a power of two.
+	///
+	/// @see ext_scalar_integer
+	template<typename genIUType>
+	GLM_FUNC_DECL genIUType nextPowerOfTwo(genIUType v);
+
+	/// Return the power of two number which value is just lower the input value,
+	/// round down to a power of two.
+	///
+	/// @see ext_scalar_integer
+	template<typename genIUType>
+	GLM_FUNC_DECL genIUType prevPowerOfTwo(genIUType v);
+
+	/// Return true if the 'Value' is a multiple of 'Multiple'.
+	///
+	/// @see ext_scalar_integer
+	template<typename genIUType>
+	GLM_FUNC_DECL bool isMultiple(genIUType v, genIUType Multiple);
+
+	/// Higher multiple number of Source.
+	///
+	/// @tparam genIUType Integer scalar or vector types.
+	///
+	/// @param v Source value to which is applied the function
+	/// @param Multiple Must be a null or positive value
+	///
+	/// @see ext_scalar_integer
+	template<typename genIUType>
+	GLM_FUNC_DECL genIUType nextMultiple(genIUType v, genIUType Multiple);
+
+	/// Lower multiple number of Source.
+	///
+	/// @tparam genIUType Integer scalar or vector types.
+	///
+	/// @param v Source value to which is applied the function
+	/// @param Multiple Must be a null or positive value
+	///
+	/// @see ext_scalar_integer
+	template<typename genIUType>
+	GLM_FUNC_DECL genIUType prevMultiple(genIUType v, genIUType Multiple);
+
+	/// Returns the bit number of the Nth significant bit set to
+	/// 1 in the binary representation of value.
+	/// If value bitcount is less than the Nth significant bit, -1 will be returned.
+	///
+	/// @tparam genIUType Signed or unsigned integer scalar types.
+	///
+	/// @see ext_scalar_integer
+	template<typename genIUType>
+	GLM_FUNC_DECL int findNSB(genIUType x, int significantBitCount);
+
+	/// @}
+} //namespace glm
+
+#include "scalar_integer.inl"