diff --git a/egs/timit/ASR/local/prepare_lexicon.py b/egs/timit/ASR/local/prepare_lexicon.py
index 1752732d3..04023a9ab 100644
--- a/egs/timit/ASR/local/prepare_lexicon.py
+++ b/egs/timit/ASR/local/prepare_lexicon.py
@@ -59,7 +59,7 @@ def prepare_lexicon(manifests_dir: str, lang_dir: str):
       The lexicon.txt file and the train.text in lang_dir.
     """
     import gzip
-    
+
     phones = set()
 
     supervisions_train = (