$OpenBSD: patch-getifaddr_c,v 1.2 2013/05/07 20:37:23 sthen Exp $
--- getifaddr.c.orig	Tue May  7 20:59:26 2013
+++ getifaddr.c	Tue May  7 21:01:27 2013
@@ -175,6 +175,9 @@ getsysaddrs(void)
 		if (p->ifa_addr && p->ifa_addr->sa_family == AF_INET)
 		{
 			addr_in = (struct sockaddr_in *)p->ifa_addr;
+#ifndef IFF_SLAVE
+#define IFF_SLAVE 0
+#endif
 			if (p->ifa_flags & (IFF_LOOPBACK | IFF_SLAVE))
 				continue;
 			memcpy(&lan_addr[n_lan_addr].addr, &addr_in->sin_addr, sizeof(lan_addr[n_lan_addr].addr));
