diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 2a62f6af2a..a1c6b6136b 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -5374,6 +5374,8 @@ static int transmit_register(struct sip_registry *r, int sipmethod, char *auth,
 		ast_copy_string(r->callid, p->callid, sizeof(r->callid));
 		if (r->portno)
 			p->sa.sin_port = htons(r->portno);
+		else 	/* Set registry port to the port set from the peer definition/srv or default */
+			r->portno = p->sa.sin_port;
 		ast_set_flag(p, SIP_OUTGOING);	/* Registration is outgoing call */
 		r->call=p;			/* Save pointer to SIP packet */
 		p->registry=ASTOBJ_REF(r);	/* Add pointer to registry in packet */