Index: main/acl.c
===================================================================
--- main/acl.c	(revision 110472)
+++ main/acl.c	(working copy)
@@ -185,7 +185,7 @@
 #if defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__linux__) || defined(__Darwin__)
 		for (ifap = ifaphead; ifap; ifap = ifap->ifa_next) {
 
-			if (ifap->ifa_addr->sa_family == AF_INET) {
+			if (ifap->ifa_addr && ifap->ifa_addr->sa_family == AF_INET) {
 				sin = (const struct sockaddr_in *) ifap->ifa_addr;
 				score_address(sin, &best_addr, &best_score);
 				res = 0;