Index: netinet6/nd6_rtr.c
===================================================================
--- netinet6/nd6_rtr.c	(revision 234664)
+++ netinet6/nd6_rtr.c	(working copy)
@@ -1745,6 +1745,7 @@
 		}
 	}
 	error = a_failure;
+	a_failure = 1;
 	if (error == 0) {
 		pr->ndpr_stateflags &= ~NDPRF_ONLINK;
 
@@ -1783,7 +1784,8 @@
 						&opr->ndpr_prefix.sin6_addr),
 					    opr->ndpr_plen, if_name(ifp),
 					    if_name(opr->ndpr_ifp), e));
-				}
+				} else
+					a_failure = 0;
 			}
 		}
 	} else {
@@ -1795,6 +1797,10 @@
 		    if_name(ifp), error));
 	}
 
+	if (a_failure)
+		lltable_prefix_free(AF_INET6, (struct sockaddr *)&sa6,
+				    (struct sockaddr *)&mask6, LLE_STATIC);
+
 	return (error);
 }