--- cpp_regex_traits.hpp.orig	Fri Oct 13 02:52:38 2006
+++ cpp_regex_traits.hpp	Thu Feb  7 10:07:37 2008
@@ -117,6 +117,8 @@
     // Reserve some bits for the implementation
     #if defined(__GLIBCXX__) && __GLIBCXX__ >= 20050209
     umaskex_t const std_ctype_reserved = 0x8000;
+    #elif defined(_CPPLIB_VER) && defined(BOOST_WINDOWS)
+    umaskex_t const std_ctype_reserved = 0x8200;
     #else
     umaskex_t const std_ctype_reserved = 0;
     #endif