diff --git a/posting.php b/posting.php
index b75e17091..ddae2287d 100644
--- a/posting.php
+++ b/posting.php
@@ -368,6 +368,15 @@ if (($delete || $mode == 'delete') && !$confirm) {
 
         if (!$error_msg) {
             \TorrentPier\Legacy\Post::user_notification($mode, $post_data, $post_info['topic_title'], $forum_id, $topic_id, $notify_user);
+
+            if (defined('ATTACHMENT_UPDATED')) {
+                global $log_action;
+                $log_action->mod('mod_topic_attach_updated', [
+                    'forum_id' => $forum_id,
+                    'topic_id' => $topic_id,
+                    'topic_title' => $post_info['topic_title'],
+                ]);
+            }
         }
 
         if ($mode == 'newtopic' || $mode == 'reply') {
diff --git a/src/Legacy/Attach.php b/src/Legacy/Attach.php
index cd9ca32d2..213b254d6 100644
--- a/src/Legacy/Attach.php
+++ b/src/Legacy/Attach.php
@@ -479,14 +479,14 @@ class Attach
                             unlink_attach($row['physical_filename'], MODE_THUMBNAIL);
                         }
 
-                        // todo: log action - torrent updated
-
                         //bt
                         if ($this->attachment_extension_list[$actual_element] === TORRENT_EXT && $attachments[$actual_element]['tracker_status']) {
                             Torrent::tracker_unregister($attachment_id);
                         }
                         //bt end
 
+                        \define('ATTACHMENT_UPDATED', true);
+
                         // Make sure it is displayed
                         $this->attachment_list[$actual_element] = $this->attach_filename;
                         $this->attachment_comment_list[$actual_element] = $comment;