diff --git a/glm/detail/type_vec4.hpp b/glm/detail/type_vec4.hpp
index 2bc1ca59..00fcfe06 100644
--- a/glm/detail/type_vec4.hpp
+++ b/glm/detail/type_vec4.hpp
@@ -93,6 +93,7 @@ namespace detail
 #		if(GLM_HAS_ANONYMOUS_UNION && defined(GLM_SWIZZLE))
 			union
 			{
+				typename simd<T>::type data;
 				struct { T r, g, b, a; };
 				struct { T s, t, p, q; };
 				struct { T x, y, z, w;};
diff --git a/glm/detail/type_vec4.inl b/glm/detail/type_vec4.inl
index ed26032c..afc26ba7 100644
--- a/glm/detail/type_vec4.inl
+++ b/glm/detail/type_vec4.inl
@@ -108,13 +108,13 @@ namespace detail
 	template <>
 	template <precision Q>
 	GLM_FUNC_QUALIFIER tvec4<float, lowp>::tvec4(tvec4<float, Q> const & v) :
-		data(_mm_set_ps(w, z, y, x))
+		data(_mm_set_ps(v.w, v.z, v.y, v.x))
 	{}
 	
 	template <>
 	template <precision Q>
 	GLM_FUNC_QUALIFIER tvec4<float, mediump>::tvec4(tvec4<float, Q> const & v) :
-		data(_mm_set_ps(w, z, y, x))
+		data(_mm_set_ps(v.w, v.z, v.y, v.x))
 	{}
 #endif
 	
diff --git a/test/gtx/gtx_simd_vec4.cpp b/test/gtx/gtx_simd_vec4.cpp
index 36e3a9e5..0f733ef9 100644
--- a/test/gtx/gtx_simd_vec4.cpp
+++ b/test/gtx/gtx_simd_vec4.cpp
@@ -13,30 +13,8 @@
 
 #if(GLM_ARCH != GLM_ARCH_PURE)
 
-
-struct value
-{
-	value(float x, float y, float z, float w) :
-		x(x), y(y), z(z), w(w)
-	{}
-	
-	union
-	{
-		__m128 data;
-		struct
-		{
-			union { float x, r, s; };
-			union { float y, g, t; };
-			union { float z, b, p; };
-			union { float w, a, q; };
-		};
-	};
-};
-
 int main()
 {
-	value Value(1.0, 0.5, 0.0, 0.7);
-	
 	glm::simdVec4 A1(0.0f, 0.1f, 0.2f, 0.3f);
 	glm::simdVec4 B1(0.4f, 0.5f, 0.6f, 0.7f);
 	glm::simdVec4 C1 = A1 + B1;