diff --git a/include/boost/regex/config.hpp b/include/boost/regex/config.hpp
index 9f95a336..8c8f5248 100644
--- a/include/boost/regex/config.hpp
+++ b/include/boost/regex/config.hpp
@@ -158,7 +158,7 @@
  * of the non-inline functions in the library, so that users can still link to the lib,
  * irrespective of whether their own code is built with /Zc:wchar_t.
  */
-#if defined(__cplusplus) && (defined(BOOST_MSVC) || defined(__ICL)) && !defined(BOOST_NO_INTRINSIC_WCHAR_T) && defined(BOOST_WINDOWS) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION)
+#if defined(__cplusplus) && (defined(BOOST_MSVC) || defined(__ICL)) && !defined(BOOST_NO_INTRINSIC_WCHAR_T) && defined(BOOST_WINDOWS) && !defined(__SGI_STL_PORT) && !defined(_STLPORT_VERSION) && !defined(BOOST_RWSTD_VER)
 #  define BOOST_REGEX_HAS_OTHER_WCHAR_T
 #  ifdef BOOST_MSVC
 #     pragma warning(push)