diff --git a/egs/librispeech/ASR/pruned_transducer_stateless_d2v_v2/.decode.py.swp b/egs/librispeech/ASR/pruned_transducer_stateless_d2v_v2/.decode.py.swp
index f85b5ada7..f280d0083 100644
Binary files a/egs/librispeech/ASR/pruned_transducer_stateless_d2v_v2/.decode.py.swp and b/egs/librispeech/ASR/pruned_transducer_stateless_d2v_v2/.decode.py.swp differ
diff --git a/egs/librispeech/ASR/pruned_transducer_stateless_d2v_v2/decode.py b/egs/librispeech/ASR/pruned_transducer_stateless_d2v_v2/decode.py
index ad4be3a43..978fb8a25 100755
--- a/egs/librispeech/ASR/pruned_transducer_stateless_d2v_v2/decode.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless_d2v_v2/decode.py
@@ -587,7 +587,7 @@ def save_results(
         for key, val in test_set_wers:
             print("{}\t{}".format(key, val), file=f)
     
-    wer = ''
+    wer = None
     s = "\nFor {}, WER of different settings are:\n".format(test_set_name)
     note = "\tbest for {}".format(test_set_name)
     for key, val in test_set_wers: