Index: ip_carp.c
===================================================================
RCS file: /cvs/src/sys/netinet/ip_carp.c,v
retrieving revision 1.321
diff -u -p -r1.321 ip_carp.c
--- ip_carp.c	9 Jan 2018 15:24:24 -0000	1.321
+++ ip_carp.c	10 Jan 2018 03:57:43 -0000
@@ -454,8 +454,7 @@ carp_proto_input_if(struct ifnet *ifp, s
 	ismulti = IN_MULTICAST(ip->ip_dst.s_addr);
 
 	/* check if received on a valid carp interface */
-	if (!(ifp->if_type == IFT_CARP ||
-	    (ifp->if_type != IFT_CARP && !ismulti && ifp->if_carp != NULL))) {
+	if (ifp->if_type != IFT_CARP) {
 		carpstat_inc(carps_badif);
 		CARP_LOG(LOG_INFO, sc,
 		    ("packet received on non-carp interface: %s",