We need macglue on MacPython-OS9 too.
diff --git a/Modules/_localemodule.c b/Modules/_localemodule.c
index 4b654d5..d535ee8 100644
--- a/Modules/_localemodule.c
+++ b/Modules/_localemodule.c
@@ -30,7 +30,7 @@
 #include <windows.h>
 #endif
 
-#if __APPLE__
+#if defined(__APPLE__) || defined(__MWERKS__)
 #include "macglue.h"
 #endif