diff --git a/glm/detail/func_exponential.inl b/glm/detail/func_exponential.inl
index 2efcdc60a..7b91f140d 100644
--- a/glm/detail/func_exponential.inl
+++ b/glm/detail/func_exponential.inl
@@ -14,7 +14,7 @@ namespace detail
 		using std::log2;
 #	else
 		template<typename genType>
-		genType log2(genType Value)
+		GLM_FUNC_QUALIFIER genType log2(genType Value)
 		{
 			return std::log(Value) * static_cast<genType>(1.4426950408889634073599246810019);
 		}