diff --git a/sbin/ipmon/Makefile b/sbin/ipmon/Makefile
index de743322c37..e56ad99d01d 100644
--- a/sbin/ipmon/Makefile
+++ b/sbin/ipmon/Makefile
@@ -6,7 +6,7 @@ PROG=	ipmon
 MAN=	ipl.4 ipmon.8
 SRCS=	ipmon.c
 
-CFLAGS+=-DUSE_INET6 -DIPL_NAME=\"/dev/ipl\"
+CFLAGS+=-DUSE_INET6 -DIPL_NAME=\"/dev/ipl\" -DLOGFAC=LOG_SECURITY
 CFLAGS+=-I${.CURDIR}/../../sys/contrib/ipfilter
 CFLAGS+=-I${.CURDIR}/../../contrib/ipfilter
 WARNS=	0