Index: sys/netpfil/pf/pf.c
===================================================================
--- sys/netpfil/pf/pf.c
+++ sys/netpfil/pf/pf.c
@@ -4075,8 +4075,6 @@
 			dnflow.f_id.src_ip6 = src->v6;
 			dnflow.f_id.dst_ip6 = dst->v6;
 			break;
-		default:
-			panic("Unknown address family");
 		}
 
 		mtag->flags |= PF_TAG_DUMMYNET;