diff --git a/glm/gtx/string_cast.inl b/glm/gtx/string_cast.inl
index c21fa75f..2a0434d8 100644
--- a/glm/gtx/string_cast.inl
+++ b/glm/gtx/string_cast.inl
@@ -479,7 +479,7 @@ namespace detail
 }//namespace detail
 
 template <template <typename, precision> class matType, typename T, precision P>
-GLM_FUNC_DECL std::string to_string(matType<T, P> const & x)
+GLM_FUNC_QUALIFIER std::string to_string(matType<T, P> const & x)
 {
 	return detail::compute_to_string<matType, T, P>::call(x);
 }
diff --git a/readme.md b/readme.md
index 16944885..ab4f1c34 100644
--- a/readme.md
+++ b/readme.md
@@ -56,6 +56,7 @@ glm::mat4 camera(float Translate, glm::vec2 const & Rotate)
 - Fixed uaddCarry warning #497
 - Fixed roundPowerOfTwo and floorPowerOfTwo #503
 - Fixed Visual C++ SIMD instruction set automatic detection in 64 bits
+- Fixed to_string when used with GLM_FORCE_INLINE #506
 
 #### [GLM 0.9.7.4](https://github.com/g-truc/glm/releases/tag/0.9.7.4) - 2016-03-19
 ##### Fixes: