diff --git a/filelist.php b/filelist.php
index b2655ba3f..bbd30b7f1 100644
--- a/filelist.php
+++ b/filelist.php
@@ -16,7 +16,7 @@ if ($bb_cfg['bt_disable_dht'] && IS_GUEST) {
     bb_simple_die($lang['BT_PRIVATE_TRACKER'], 403);
 }
 
-$topic_id = !empty($_GET['topic']) ? (int)$_GET['topic'] : false;
+$topic_id = isset($_GET[POST_TOPIC_URL]) ? (int)$_GET[POST_TOPIC_URL] : 0;
 
 if (!$topic_id) {
     bb_simple_die($lang['INVALID_TOPIC_ID'], 404);
@@ -28,7 +28,6 @@ $sql = 'SELECT t.attach_id, t.info_hash, t.info_hash_v2, t.size, ad.physical_fil
         ON t.attach_id = ad.attach_id
         WHERE t.topic_id = ' . $topic_id . '
         LIMIT 1';
-
 $row = DB()->fetch_row($sql);
 
 if (empty($row['physical_filename'])) {
diff --git a/library/includes/init_bb.php b/library/includes/init_bb.php
index 8e18583e7..e002fbbc0 100644
--- a/library/includes/init_bb.php
+++ b/library/includes/init_bb.php
@@ -299,12 +299,11 @@ define('POSTING_URL', $bb_cfg['posting_url']);
 define('PROFILE_URL', 'profile.php?mode=viewprofile&u=');
 define('BONUS_URL', 'profile.php?mode=bonus');
 define('TOPIC_URL', 'viewtopic.php?t=');
-define('FILELIST_URL', 'filelist.php?topic=');
+define('FILELIST_URL', 'filelist.php?t=');
 
 define('USER_AGENT', strtolower($_SERVER['HTTP_USER_AGENT']));
 
 define('HTML_SELECT_MAX_LENGTH', 60);
-define('HTML_WBR_LENGTH', 12);
 
 define('HTML_CHECKED', ' checked ');
 define('HTML_DISABLED', ' disabled ');