diff --git a/library/attach_mod/displaying_torrent.php b/library/attach_mod/displaying_torrent.php
index 0bd546b29..965ec08a5 100644
--- a/library/attach_mod/displaying_torrent.php
+++ b/library/attach_mod/displaying_torrent.php
@@ -88,7 +88,7 @@ if ($tor_auth_reg || $tor_auth_del) {
     $tracker_link = ($tor_reged) ? $unreg_tor_url : $reg_tor_url;
 }
 
-$display_name = wbr($t_data['topic_title']) . ' [' . $bb_cfg['server_name'] . '-' . $bt_topic_id . ']' . '.torrent';
+$display_name = wbr($t_data['topic_title']) . ' [' . $bb_cfg['server_name'] . '-' . $bt_topic_id . ']' . '.' . TORRENT_EXT;
 
 if (!$tor_reged) {
     $template->assign_block_vars('postrow.attach.tor_not_reged', [
diff --git a/src/Legacy/Torrent.php b/src/Legacy/Torrent.php
index f47150a91..c56b64e57 100644
--- a/src/Legacy/Torrent.php
+++ b/src/Legacy/Torrent.php
@@ -599,7 +599,7 @@ class Torrent
         // Send torrent
         $output = \Arokettu\Bencode\Bencode::encode($tor);
 
-        $dl_fname = html_entity_decode($topic_title, ENT_QUOTES, 'UTF-8') . ' [' . $bb_cfg['server_name'] . '-' . $topic_id . ']' . '.torrent';
+        $dl_fname = html_entity_decode($topic_title, ENT_QUOTES, 'UTF-8') . ' [' . $bb_cfg['server_name'] . '-' . $topic_id . ']' . '.' . TORRENT_EXT;
 
         if (!empty($_COOKIE['explain'])) {
             $out = "attach path: $filename<br /><br />";