sms: Add new SMS requests to the end of the list.
diff --git a/openbsc/src/sms_queue.c b/openbsc/src/sms_queue.c
index 0c154b2..079755d 100644
--- a/openbsc/src/sms_queue.c
+++ b/openbsc/src/sms_queue.c
@@ -276,7 +276,7 @@
 
 		attempted += 1;
 		smsq->pending += 1;
-		llist_add(&pending->entry, &smsq->pending_sms);
+		llist_add_tail(&pending->entry, &smsq->pending_sms);
 		gsm411_send_sms_subscr(sms->receiver, sms);
 	} while (attempted < attempts && rounds < 1000);