diff --git a/glm/ext.hpp b/glm/ext.hpp
index e28d4fdb..e337d9af 100644
--- a/glm/ext.hpp
+++ b/glm/ext.hpp
@@ -73,6 +73,7 @@
 #include "./gtx/string_cast.hpp"
 #include "./gtx/transform.hpp"
 #include "./gtx/transform2.hpp"
+#include "./gtx/ulp.hpp"
 #include "./gtx/unsigned_int.hpp"
 #include "./gtx/vec1.hpp"
 #include "./gtx/vector_access.hpp"
diff --git a/glm/gtx/ulp.hpp b/glm/gtx/ulp.hpp
new file mode 100644
index 00000000..b15f08cf
--- /dev/null
+++ b/glm/gtx/ulp.hpp
@@ -0,0 +1,50 @@
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Created : 2011-02-21
+// Updated : 2009-02-21
+// Licence : This source is under MIT License
+// File    : glm/gtx/ulp.hpp
+///////////////////////////////////////////////////////////////////////////////////////////////////
+// Dependency:
+// - GLM core
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+#ifndef glm_gtx_ulp
+#define glm_gtx_ulp
+
+// Dependency:
+#include "../glm.hpp"
+
+#if(defined(GLM_MESSAGES) && !defined(glm_ext))
+#	pragma message("GLM: GLM_GTX_ulp extension included")
+#endif
+
+namespace glm
+{
+	namespace gtx{
+	//! GLM_GTX_ulp extension: Precision calculation functions
+	namespace spline
+	{
+		/// \addtogroup gtx_ulp
+		///@{
+
+		//! Return the number of ULP between 2 variables.
+		//! From GLM_GTX_ulp extension.
+		template <typename genType>
+		genIType ulp(
+			genType const & a,
+			genType const & b);
+
+		///@}
+
+	}//namespace ulp
+	}//namespace gtx
+}//namespace glm
+
+#include "spline.inl"
+
+namespace glm{using namespace gtx::spline;}
+
+#endif//glm_gtx_spline
+
diff --git a/glm/gtx/ulp.inl b/glm/gtx/ulp.inl
new file mode 100644
index 00000000..e69de29b