diff --git a/sys/netinet6/in6.c b/sys/netinet6/in6.c
--- a/sys/netinet6/in6.c
+++ b/sys/netinet6/in6.c
@@ -929,9 +929,10 @@
 			    "be specified for a p2p or a loopback IF only\n"));
 			return (EINVAL);
 		}
-		if (plen != 128) {
+		if (plen != 128 && ((ifp->if_flags & IFF_POINTOPOINT) == 0)) {
 			nd6log((LOG_INFO, "in6_update_ifa: prefixlen should "
-			    "be 128 when dstaddr is specified\n"));
+			    "be 128 when dstaddr is specified and the "
+			    "IF is not p2p\n"));
 			return (EINVAL);
 		}
 	}