diff --git a/include/boost/regex/config.hpp b/include/boost/regex/config.hpp
index 5cdaedf9..806ead59 100644
--- a/include/boost/regex/config.hpp
+++ b/include/boost/regex/config.hpp
@@ -114,7 +114,7 @@
 // If Win32 support has been disabled for boost in general, then
 // it is for regex in particular:
 //
-#ifdef BOOST_DISABLE_WIN32
+#if defined(BOOST_DISABLE_WIN32) && !defined(BOOST_REGEX_NO_W32)
 #  define BOOST_REGEX_NO_W32
 #endif