diff -ruN --exclude=CVS /usr/ports/net/libnetdude/Makefile /usr/home/yb/tmp/ports/net/libnetdude/Makefile
--- /usr/ports/net/libnetdude/Makefile	Tue May  4 09:35:47 2004
+++ /usr/home/yb/tmp/ports/net/libnetdude/Makefile	Sat May  8 11:02:43 2004
@@ -23,13 +23,17 @@
 INSTALLS_SHLIB=	yes
 USE_REINPLACE=	yes
 
+.include <bsd.port.pre.mk>
+
 post-patch:
+.if ${OSVERSION} >= 500000
 	@${REINPLACE_CMD} -e "s|netinet/if_fddi.h|net/fddi.h|g" \
 	${WRKSRC}/protocols/fddi/libnd_fddi.h
+.endif
 	@${REINPLACE_CMD} -e 's|DOC_MODULE = libnetdude|DOC_MODULE =|' \
 	${WRKSRC}/docs/Makefile.in
 .if defined(NOPORTDOCS)
 	@${REINPLACE_CMD} -e 's|docs||' ${WRKSRC}/Makefile.in
 .endif
 
-.include <bsd.port.mk>
+.include <bsd.port.post.mk>