diff --git a/apps/app_queue.c b/apps/app_queue.c
index 2bf67bde190f4009cc83d8fab3fff0aeeac129eb..3c4bae1b9dde839d6e18e00153f7bba9d7a7421f 100644
--- a/apps/app_queue.c
+++ b/apps/app_queue.c
@@ -1939,7 +1939,7 @@ static int say_periodic_announcement(struct queue_ent *qe, int ringing)
 	ast_verb(3, "Playing periodic announcement\n");
 
 	/* Check to make sure we have a sound file. If not, reset to the first sound file */
-	if (qe->last_periodic_announce_sound >= MAX_PERIODIC_ANNOUNCEMENTS || !strlen(qe->parent->sound_periodicannounce[qe->last_periodic_announce_sound])) {
+	if (qe->last_periodic_announce_sound >= MAX_PERIODIC_ANNOUNCEMENTS || ast_strlen_zero(qe->parent->sound_periodicannounce[qe->last_periodic_announce_sound])) {
 		qe->last_periodic_announce_sound = 0;
 	}