diff --git a/include/boost/static_string/config.hpp b/include/boost/static_string/config.hpp
index 15e8853..d286841 100644
--- a/include/boost/static_string/config.hpp
+++ b/include/boost/static_string/config.hpp
@@ -68,6 +68,8 @@
 #else
 #define BOOST_STATIC_STRING_NODISCARD
 #endif
+#else
+#define BOOST_STATIC_STRING_NODISCARD
 #endif
 
 // _MSVC_LANG isn't avaliable until after VS2015