diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index 64f616bb93..af380e9e5b 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -9082,15 +9082,14 @@ static void *sched_thread(void *ignore)
 	struct timespec ts;
 
 	for (;;) {
+		pthread_testcancel();
+		ast_mutex_lock(&sched_lock);
 		res = ast_sched_wait(sched);
 		if ((res > 1000) || (res < 0))
 			res = 1000;
 		tv = ast_tvadd(ast_tvnow(), ast_samp2tv(res, 1000));
 		ts.tv_sec = tv.tv_sec;
 		ts.tv_nsec = tv.tv_usec * 1000;
-
-		pthread_testcancel();
-		ast_mutex_lock(&sched_lock);
 		ast_cond_timedwait(&sched_cond, &sched_lock, &ts);
 		ast_mutex_unlock(&sched_lock);
 		pthread_testcancel();