diff --git a/Tools/bgen/bgen/macsupport.py b/Tools/bgen/bgen/macsupport.py
index 83018641eb9..b02e00be381 100644
--- a/Tools/bgen/bgen/macsupport.py
+++ b/Tools/bgen/bgen/macsupport.py
@@ -116,8 +116,12 @@ def errorCheck(self, name):
 
 # Stuff added immediately after the system include files
 includestuff = """
+#ifdef _WIN32
+#include "pywintoolbox.h"
+#else
 #include "macglue.h"
 #include "pymactoolbox.h"
+#endif
 
 /* Macro to test whether a weak-loaded CFM function exists */
 #define PyMac_PRECHECK(rtn) do { if ( &rtn == NULL )  {\\