Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(revision 309764)
+++ channels/chan_sip.c	(working copy)
@@ -18507,10 +18507,10 @@
 	const char *md5secret;
 	struct sip_auth *auth = NULL;	/* Realm authentication */
 
-	if (!ast_strlen_zero(p->domain))
+	if (!ast_strlen_zero(p->uri))
+		ast_copy_string(uri, p->uri, sizeof(uri));
+	else if (!ast_strlen_zero(p->domain))
 		ast_copy_string(uri, p->domain, sizeof(uri));
-	else if (!ast_strlen_zero(p->uri))
-		ast_copy_string(uri, p->uri, sizeof(uri));
 	else
 		snprintf(uri, sizeof(uri), "sip:%s@%s", p->username, ast_sockaddr_stringify_host(&p->sa));