diff --git a/usr.sbin/traceroute6/traceroute6.c b/usr.sbin/traceroute6/traceroute6.c
--- a/usr.sbin/traceroute6/traceroute6.c
+++ b/usr.sbin/traceroute6/traceroute6.c
@@ -1009,6 +1009,10 @@
 								printf(" !");
 							++got_there;
 							break;
+						default:
+							++unreachable;
+							printf(" !<%d>", code & 0xff);
+							break;
 						}
 					} else if (type == ICMP6_PARAM_PROB &&
 					    code == ICMP6_PARAMPROB_NEXTHEADER) {