--- in.c	2009-03-20 21:09:46.000000000 +0000
+++ src/sys/netinet/in.c	2009-03-20 21:15:35.000000000 +0000
@@ -634,11 +634,13 @@ in_lifaddr_ioctl(struct socket *so, u_lo
 		}
 
 		TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)	{
-			if (ifa->ifa_addr->sa_family != AF_INET6)
+			struct sockaddr_in *sa;
+			sa=(struct sockaddr_in *)ifa->ifa_addr;
+			if (ifa->ifa_addr->sa_family != AF_INET)
 				continue;
 			if (match.s_addr == 0)
 				break;
-			candidate.s_addr = ((struct sockaddr_in *)&ifa->ifa_addr)->sin_addr.s_addr;
+			candidate.s_addr = sa->sin_addr.s_addr;
 			candidate.s_addr &= mask.s_addr;
 			if (candidate.s_addr == match.s_addr)
 				break;