diff --git a/filelist.php b/filelist.php
index fc8c1374b..fe24f1796 100644
--- a/filelist.php
+++ b/filelist.php
@@ -35,13 +35,15 @@ if (!$row = DB()->fetch_row($sql)) {
 }
 
 // Previous/next topic links
-$topics_sql = '
+$sql = '
     (SELECT topic_id FROM ' . BB_BT_TORRENTS . ' WHERE topic_id < ' . $topic_id . ' ORDER BY topic_id DESC LIMIT 1)
     UNION
     (SELECT topic_id FROM ' . BB_BT_TORRENTS . ' WHERE topic_id >= ' . $topic_id . ' ORDER BY topic_id ASC LIMIT 2)
     ORDER BY topic_id ASC';
 
-$topics = DB()->fetch_rowset($topics_sql);
+if (!$topics = DB()->fetch_rowset($sql)) {
+    bb_die($lang['INVALID_TOPIC_ID_DB'], 404);
+}
 $topic_ids = array_column($topics, 'topic_id');
 
 $current_index = array_search($topic_id, $topic_ids);
@@ -61,6 +63,7 @@ $template->assign_vars([
     'U_NEXT_TOPIC' => "filelist.php?t=$next_topic_id",
     'U_PREV_TOPIC' => "filelist.php?t=$prev_topic_id",
 ]);
+unset($prev_topic_id, $next_topic_id, $current_index, $topic_ids, $topics);
 
 // Protocol meta
 $meta_v1 = !empty($row['info_hash']);