diff --git a/glm/gtx/ulp.inl b/glm/gtx/ulp.inl
index 253f5b4e..931c33c4 100644
--- a/glm/gtx/ulp.inl
+++ b/glm/gtx/ulp.inl
@@ -15,13 +15,14 @@ namespace ulp
 {
 	inline std::size_t ulp
 	(
-		double const & a,
-		double const & b
+		half const & a,
+		half const & b
 	)
 	{
 		std::size_t Count = 0;
-		double Temp = a;
-		while((Temp = nextafterf(Temp, b)) != b)
+		float TempA = a;
+		float TempB = b;
+		while((TempA = nextafterf(TempA, TempB)) != TempB)
 			++Count;
 		return Count;
 	}
@@ -38,6 +39,59 @@ namespace ulp
 			++Count;
 		return Count;
 	}
+
+	inline std::size_t ulp
+	(
+		double const & a,
+		double const & b
+	)
+	{
+		std::size_t Count = 0;
+		double Temp = a;
+		while((Temp = nextafter(Temp, b)) != b)
+			++Count;
+		return Count;
+	}
+
+	template <typename valType>
+	inline detail::xvec2<valType> ulp
+	(
+		detail::xvec2<valType> const & a,
+		detail::xvec2<valType> const & b
+	)
+	{
+		return detail::xvec2<valType>(
+				ulp(a[0], b[0]),
+				ulp(a[1], b[1]));
+	}
+
+	template <typename valType>
+	inline detail::xvec3<valType> ulp
+	(
+		detail::xvec3<valType> const & a,
+		detail::xvec3<valType> const & b
+	)
+	{
+		return detail::xvec2<valType>(
+				ulp(a[0], b[0]),
+				ulp(a[1], b[1]),
+				ulp(a[2], b[2]));
+	}
+
+	template <typename valType>
+	inline detail::xvec4<valType> ulp
+	(
+		detail::xvec4<valType> const & a,
+		detail::xvec4<valType> const & b
+	)
+	{
+		return detail::xvec2<valType>(
+				ulp(a[0], b[0]),
+				ulp(a[1], b[1]),
+				ulp(a[2], b[2]),
+				ulp(a[3], b[3]));
+	}
+
 }//namespace ulp
 }//namespace gtx
 }//namespace glm