diff --git a/lib/filenoticestream.php b/lib/filenoticestream.php
index 6dd5a84ff0..f7bca1ed68 100644
--- a/lib/filenoticestream.php
+++ b/lib/filenoticestream.php
@@ -42,7 +42,7 @@ class FileNoticeStream extends ScopingNoticeStream
             $profile = Profile::current();
         }
         parent::__construct(new CachingNoticeStream(new RawFileNoticeStream($file),
-                                                    'file:notice-ids:'.$this->file->id),
+                                                    'file:notice-ids:'.$file->id),
                             $profile);
     }
 }