Oops.  The -W option takes args, not -X.
diff --git a/Modules/main.c b/Modules/main.c
index 7c368c7..3f7b081 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -29,7 +29,7 @@
 static int  orig_argc;
 
 /* command line options */
-#define BASE_OPTS "c:dD:EhiOStuUvVWxX:"
+#define BASE_OPTS "c:dD:EhiOStuUvVW:xX"
 
 #ifndef RISCOS
 #define PROGRAM_OPTS BASE_OPTS