diff --git a/sbin/ipfw/Makefile b/sbin/ipfw/Makefile
index bfd1561d1c5c..023f682b25f5 100644
--- a/sbin/ipfw/Makefile
+++ b/sbin/ipfw/Makefile
@@ -4,6 +4,5 @@ PROG=	ipfw
 SRCS=	ipfw2.c
 WARNS?=	0
 MAN=	ipfw.8
-CFLAGS+= -I${.CURDIR}/../../sys/contrib/pf
 
 .include <bsd.prog.mk>