diff --git a/glm/detail/type_quat.inl b/glm/detail/type_quat.inl
index 041793df1..d44f494ed 100644
--- a/glm/detail/type_quat.inl
+++ b/glm/detail/type_quat.inl
@@ -74,14 +74,14 @@ namespace detail
 	GLM_FUNC_QUALIFIER GLM_CONSTEXPR T & qua<T, Q>::operator[](typename qua<T, Q>::length_type i)
 	{
 		assert(i >= 0 && i < this->length());
-		return (&w)[i];
+		return (&x)[i];
 	}
 
 	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER GLM_CONSTEXPR T const& qua<T, Q>::operator[](typename qua<T, Q>::length_type i) const
 	{
 		assert(i >= 0 && i < this->length());
-		return (&w)[i];
+		return (&x)[i];
 	}
 
 	// -- Implicit basic constructors --