diff --git a/upload/source/class/adv/adv_threadlist.php b/upload/source/class/adv/adv_threadlist.php
index 2cb4de455d5a4dcae495315116e8afdab27a60ec..0ad6ed774dbb772dbe10f234eeded0ba8065fb83 100644
--- a/upload/source/class/adv/adv_threadlist.php
+++ b/upload/source/class/adv/adv_threadlist.php
@@ -124,7 +124,7 @@ class adv_threadlist {
 			$vt = $_G[\'adv_vtp_thread\'];
 			$adi = !empty($_G[\'adv_vtp\'][1][$_G[\'adv_vtp_count\']]) ? 1 : 0;
 			$adary = array_diff($_G[\'adv_vtp\'][$adi][$_G[\'adv_vtp_count\']], $_G[\'adv_vtp_showed\']);
-			$adid = $adary[array_rand($adary)];
+			$adid = empty($adary) ? 0 : $adary[array_rand($adary)];
 			$_G[\'adv_vtp_showed\'][] = $adid;
 			$vttid = $parameters[$adid][\'tid\'];
 			$notag = true;