--- b/sys/net/if.c	
+++ b/sys/net/if.c	
@@ -1908,6 +1908,7 @@ ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
     struct sockaddr *ia)
 {
 	int error;
+	int fibnum;
 	struct rt_addrinfo info;
 	struct sockaddr_dl null_sdl;
 	struct ifnet *ifp;
@@ -1922,6 +1923,16 @@ ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
 	info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
 	link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
 
+	// XXX: prevent dangling loopback route in other fibs
+	if (cmd == RTM_DELETE) {
+		for (fibnum = 0; fibnum < rt_numfibs; fibnum++) {
+			if (fibnum == ifp->if_fib)
+				continue;
+
+			(void) rtrequest1_fib(cmd, &info, NULL, fibnum);
+		}
+	}
+
 	error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
 
 	if (error == 0 ||