diff --git a/sys/netpfil/pf/pf.c b/sys/netpfil/pf/pf.c
--- a/sys/netpfil/pf/pf.c
+++ b/sys/netpfil/pf/pf.c
@@ -9693,17 +9693,23 @@
 	dnflow->f_id.proto = pd->proto;
 	dnflow->f_id.extra = dnflow->rule.info;
 	switch (pd->naf) {
+#ifdef INET
 	case AF_INET:
 		dnflow->f_id.addr_type = 4;
 		dnflow->f_id.src_ip = ntohl(pd->src->v4.s_addr);
 		dnflow->f_id.dst_ip = ntohl(pd->dst->v4.s_addr);
 		break;
+#endif /* INET */
+#ifdef INET6
 	case AF_INET6:
 		dnflow->flags |= IPFW_ARGS_IP6;
 		dnflow->f_id.addr_type = 6;
 		dnflow->f_id.src_ip6 = pd->src->v6;
 		dnflow->f_id.dst_ip6 = pd->dst->v6;
 		break;
+#endif /* INET6 */
+	default:
+		unhandled_af(pd->naf);
 	}
 
 	return (true);