diff --git a/glm/gtx/simd_vec4.hpp b/glm/gtx/simd_vec4.hpp
index 5f5a7e11..3877f821 100644
--- a/glm/gtx/simd_vec4.hpp
+++ b/glm/gtx/simd_vec4.hpp
@@ -186,15 +186,15 @@ namespace detail
 		//////////////////////////////////////
 		// Swizzle operators
 
-		template <comp X, comp Y, comp Z, comp W>
+		template <comp X_, comp Y_, comp Z_, comp W_>
 		fvec4SIMD& swizzle();
-		template <comp X, comp Y, comp Z, comp W>
+		template <comp X_, comp Y_, comp Z_, comp W_>
 		fvec4SIMD swizzle() const;
-		template <comp X, comp Y, comp Z>
+		template <comp X_, comp Y_, comp Z_>
 		fvec4SIMD swizzle() const;
-		template <comp X, comp Y>
+		template <comp X_, comp Y_>
 		fvec4SIMD swizzle() const;
-		template <comp X>
+		template <comp X_>
 		fvec4SIMD swizzle() const;
 	};
 }//namespace detail
diff --git a/glm/gtx/simd_vec4.inl b/glm/gtx/simd_vec4.inl
index 08ca10f9..b1413eea 100644
--- a/glm/gtx/simd_vec4.inl
+++ b/glm/gtx/simd_vec4.inl
@@ -186,21 +186,21 @@ GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::operator--()
 //////////////////////////////////////
 // Swizzle operators
 
-template <comp X, comp Y, comp Z, comp W>
+template <comp X_, comp Y_, comp Z_, comp W_>
 GLM_FUNC_QUALIFIER fvec4SIMD fvec4SIMD::swizzle() const
 {
 	__m128 Data = _mm_shuffle_ps(
 		this->Data, this->Data, 
-		shuffle_mask<(W << 6) | (Z << 4) | (Y << 2) | (X << 0)>::value);
+		shuffle_mask<(W_ << 6) | (Z_ << 4) | (Y_ << 2) | (X_ << 0)>::value);
 	return fvec4SIMD(Data);
 }
 
-template <comp X, comp Y, comp Z, comp W>
+template <comp X_, comp Y_, comp Z_, comp W_>
 GLM_FUNC_QUALIFIER fvec4SIMD& fvec4SIMD::swizzle()
 {
 	this->Data = _mm_shuffle_ps(
 		this->Data, this->Data, 
-		shuffle_mask<(W << 6) | (Z << 4) | (Y << 2) | (X << 0)>::value);
+		shuffle_mask<(W_ << 6) | (Z_ << 4) | (Y_ << 2) | (X_ << 0)>::value);
 	return *this;
 }