diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 2c4eb1642d..9e0b0665ca 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -11342,7 +11342,7 @@ static int restart_monitor(void)
 		pthread_kill(monitor_thread, SIGURG);
 	} else {
 		/* Start a new monitor */
-		if (ast_pthread_create(&monitor_thread, &attr, do_monitor, NULL) < 0) {
+		if (ast_pthread_create(&monitor_thread, NULL, do_monitor, NULL) < 0) {
 			ast_mutex_unlock(&monlock);
 			ast_log(LOG_ERROR, "Unable to start monitor thread.\n");
 			return -1;