diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 08a33d8876..74871304b3 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -1771,14 +1771,16 @@ static void build_via(struct sip_pvt *p)
  */
 static enum sip_result ast_sip_ouraddrfor(struct in_addr *them, struct in_addr *us)
 {
-	struct sockaddr_in theirs;
+	struct sockaddr_in theirs, ours;
 
 	/* Get our local information */
 	ast_ouraddrfor(them, us);
 	theirs.sin_addr = *them;
+	ours.sin_addr = *us;
 
 	if (localaddr && externip.sin_addr.s_addr &&
-	    ast_apply_ha(localaddr, &theirs)) {
+	    (ast_apply_ha(localaddr, &theirs)) &&
+	    (!ast_apply_ha(localaddr, &ours))) {
 		if (externexpire && time(NULL) >= externexpire) {
 			struct ast_hostent ahp;
 			struct hostent *hp;