diff --git a/sys/netinet6/nd6.c b/sys/netinet6/nd6.c
index a09df8a80ef..4bad92e3f25 100644
--- a/sys/netinet6/nd6.c
+++ b/sys/netinet6/nd6.c
@@ -1390,6 +1390,8 @@ nd6_rtrequest(req, rt, info)
 					    ip6_sprintf(&llsol), error));
 				}
 			}
+		} else if (req == RTM_ADD && SDL(gate)->sdl_alen == 0) {
+			ln->ln_state = ND6_LLINFO_INCOMPLETE;
 		}
 		break;