diff --git a/include/boost/static_string/config.hpp b/include/boost/static_string/config.hpp
index 4bff185..848b034 100644
--- a/include/boost/static_string/config.hpp
+++ b/include/boost/static_string/config.hpp
@@ -172,8 +172,9 @@ defined(__clang__) && \
 // that cannot use the library comparison function
 // objects at all in constant expresssions. In these
 // cases, we use whatever will make more constexpr work.
-#if defined(__clang__) && defined(__GLIBCXX__) && \
-(__GLIBCXX__ >= 20180726L && __GLIBCXX__ <= 20190812L)
+#if defined(__clang__) && \
+((defined(__GLIBCXX__) &&__GLIBCXX__ >= 20180726L \
+&& __GLIBCXX__ <= 20190812L) || defined(_MSC_VER))
 #define BOOST_STATIC_STRING_NO_PTR_COMP_FUNCTIONS
 #endif