diff --git a/unix/uxnet.c b/unix/uxnet.c
index 96d3aa51..8e95a65e 100644
--- a/unix/uxnet.c
+++ b/unix/uxnet.c
@@ -301,7 +301,9 @@ static int sk_nextaddr(SockAddr addr, SockAddrStep *step)
 
 void sk_getaddr(SockAddr addr, char *buf, int buflen)
 {
-
+    /* XXX not clear what we should return for Unix-domain sockets; let's
+     * hope the question never arises */
+    assert(addr->superfamily != UNIX);
     if (addr->superfamily == UNRESOLVED) {
 	strncpy(buf, addr->hostname, buflen);
 	buf[buflen-1] = '\0';
@@ -359,9 +361,10 @@ static int sockaddr_is_loopback(struct sockaddr *sa)
 
 int sk_address_is_local(SockAddr addr)
 {
-
     if (addr->superfamily == UNRESOLVED)
 	return 0;                      /* we don't know; assume not */
+    else if (addr->superfamily == UNIX)
+	return 1;
     else {
 #ifndef NO_IPV6
 	return sockaddr_is_loopback(addr->ais->ai_addr);