Index: main/dnsmgr.c
===================================================================
--- main/dnsmgr.c	(revision 165809)
+++ main/dnsmgr.c	(working copy)
@@ -164,6 +164,8 @@
 	if (verbose)
 		ast_verb(3, "refreshing '%s'\n", entry->name);
 
+	tmp.sin_port = entry->last.sin_port;
+
 	if (!ast_get_ip_or_srv(&tmp, entry->name, entry->service) && inaddrcmp(&tmp, &entry->last)) {
 		ast_copy_string(iabuf, ast_inet_ntoa(entry->last.sin_addr), sizeof(iabuf));
 		ast_copy_string(iabuf2, ast_inet_ntoa(tmp.sin_addr), sizeof(iabuf2));