diff --git a/include/boost/regex/config.hpp b/include/boost/regex/config.hpp
index 768589d1..4dbf7f4b 100644
--- a/include/boost/regex/config.hpp
+++ b/include/boost/regex/config.hpp
@@ -109,7 +109,7 @@
 // If there isn't good enough wide character support then there will
 // be no wide character regular expressions:
 //
-#if defined(BOOST_NO_CWCHAR) || defined(BOOST_NO_CWCTYPE) || defined(BOOST_NO_STD_WSTRING)
+#if (defined(BOOST_NO_CWCHAR) || defined(BOOST_NO_CWCTYPE) || defined(BOOST_NO_STD_WSTRING)) && !defined(BOOST_NO_WREGEX)
 #  define BOOST_NO_WREGEX
 #else
 #  if defined(__sgi) && defined(__SGI_STL_PORT)