diff -rup gtk-vnc-0.3.8.orig/src/gvnc.c gtk-vnc-0.3.8.new/src/gvnc.c
--- gtk-vnc-0.3.8.orig/src/gvnc.c	2009-03-05 15:35:33.000000000 +0000
+++ gtk-vnc-0.3.8.new/src/gvnc.c	2009-03-05 15:57:58.000000000 +0000
@@ -2579,7 +2579,9 @@ static gboolean gvnc_perform_auth_sasl(s
 			   errno, strerror(errno));
 		goto error;
 	}
-	if ((localAddr = gvnc_addr_to_string(&sa, salen)) == NULL)
+	if ((sa.ss_family == AF_INET ||
+	     sa.ss_family == AF_INET6) &&
+	    (localAddr = gvnc_addr_to_string(&sa, salen)) == NULL)
 		goto error;
 
 	/* Get remote address in form  IPADDR:PORT */
@@ -2590,7 +2592,9 @@ static gboolean gvnc_perform_auth_sasl(s
 		g_free(localAddr);
 		goto error;
 	}
-	if ((remoteAddr = gvnc_addr_to_string(&sa, salen)) == NULL) {
+	if ((sa.ss_family == AF_INET ||
+	     sa.ss_family == AF_INET6) &&
+	    (remoteAddr = gvnc_addr_to_string(&sa, salen)) == NULL) {
 		g_free(localAddr);
 		goto error;
 	}