diff --git a/misc/metromap/Makefile b/misc/metromap/Makefile
index cc2e6d59d359..7eb0bf34d924 100644
--- a/misc/metromap/Makefile
+++ b/misc/metromap/Makefile
@@ -25,5 +25,6 @@ post-patch:
 	@${REINPLACE_CMD} -e 's,/usr,${PREFIX},' ${WRKSRC}/Makefile
 	@${REINPLACE_CMD} -e 's,make,${GMAKE},' ${WRKSRC}/Makefile
 	@${REINPLACE_CMD} -e 's,/usr/bin/python,${SETENV} python,' ${WRKSRC}/metromap.py
+	@${RM} -f ${WRKSRC}/modules/ReadMap.py.orig
 
 .include <bsd.port.mk>