diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 5b2c3aa381..0fdcf1b0b7 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -1516,7 +1516,6 @@ def post_process(self, filename, ie_info):
             pps_chain.extend(ie_info['__postprocessors'])
         pps_chain.extend(self._pps)
         for pp in pps_chain:
-            old_filename = info['filepath']
             try:
                 files_to_delete, info = pp.run(info)
             except PostProcessingError as e: