Index: if_ether.c
===================================================================
--- if_ether.c	(revision 185486)
+++ if_ether.c	(working copy)
@@ -909,12 +909,12 @@
 			 * over who claims what Ether address.
 			 */
 			if (rt->rt_ifp == ifp) {
-				rtfree(rt);
+				RTFREE_LOCKED(rt);
 				goto drop;
 			}
 			(void)memcpy(ar_tha(ah), ar_sha(ah), ah->ar_hln);
 			(void)memcpy(ar_sha(ah), enaddr, ah->ar_hln);
-			rtfree(rt);
+			RTFREE_LOCKED(rt);
 
 			/*
 			 * Also check that the node which sent the ARP packet
@@ -933,10 +933,10 @@
 				    " from %s via %s, expecting %s\n",
 				    inet_ntoa(isaddr), ifp->if_xname,
 				    rt->rt_ifp->if_xname);
-				rtfree(rt);
+				RTFREE_LOCKED(rt);
 				goto drop;
 			}
-			rtfree(rt);
+			RTFREE_LOCKED(rt);
 
 #ifdef DEBUG_PROXY
 			printf("arp: proxying for %s\n",