Index: deluge/core/torrentmanager.py
===================================================================
--- deluge/core/torrentmanager.py	(revision 5780)
+++ deluge/core/torrentmanager.py	(working copy)
@@ -848,6 +940,9 @@
             # This is just a regular file rename so send the signal
             component.get("EventManager").emit(TorrentFileRenamedEvent(torrent_id, alert.index, alert.name))
 
+        # Update renamed name in fastresume
+        self.save_resume_data((torrent_id, ))
+
     def on_alert_metadata_received(self, alert):
         log.debug("on_alert_metadata_received")
         try: