diff --git a/glm/detail/_noise.hpp b/glm/detail/_noise.hpp
index 5a874a02..5adfe7f5 100644
--- a/glm/detail/_noise.hpp
+++ b/glm/detail/_noise.hpp
@@ -17,20 +17,8 @@ namespace detail
 		return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
 	}
 
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<2, T, Q> permute(vec<2, T, Q> const& x)
-	{
-		return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
-	}
-
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<3, T, Q> permute(vec<3, T, Q> const& x)
-	{
-		return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
-	}
-
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<4, T, Q> permute(vec<4, T, Q> const& x)
+	template<length_t L,typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> permute(vec<L, T, Q> const& x)
 	{
 		return mod289(((x * static_cast<T>(34)) + static_cast<T>(1)) * x);
 	}
@@ -41,41 +29,18 @@ namespace detail
 		return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
 	}
 
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<2, T, Q> taylorInvSqrt(vec<2, T, Q> const& r)
+	template<length_t L,typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> taylorInvSqrt(vec<L, T, Q> const& r)
 	{
 		return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
 	}
 
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<3, T, Q> taylorInvSqrt(vec<3, T, Q> const& r)
-	{
-		return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
-	}
-
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<4, T, Q> taylorInvSqrt(vec<4, T, Q> const& r)
-	{
-		return static_cast<T>(1.79284291400159) - static_cast<T>(0.85373472095314) * r;
-	}
-
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<2, T, Q> fade(vec<2, T, Q> const& t)
+	template<length_t L,typename T, qualifier Q>
+	GLM_FUNC_QUALIFIER vec<L, T, Q> fade(vec<L, T, Q> const& t)
 	{
 		return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
 	}
 
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<3, T, Q> fade(vec<3, T, Q> const& t)
-	{
-		return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
-	}
-
-	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER vec<4, T, Q> fade(vec<4, T, Q> const& t)
-	{
-		return (t * t * t) * (t * (t * static_cast<T>(6) - static_cast<T>(15)) + static_cast<T>(10));
-	}
 }//namespace detail
 }//namespace glm