diff --git a/egs/librispeech/ASR/tdnn_lstm_ctc/train.py b/egs/librispeech/ASR/tdnn_lstm_ctc/train.py
index 9d1712e61..c58ffa972 100755
--- a/egs/librispeech/ASR/tdnn_lstm_ctc/train.py
+++ b/egs/librispeech/ASR/tdnn_lstm_ctc/train.py
@@ -19,7 +19,6 @@
 
 import argparse
 import logging
-import collections
 from pathlib import Path
 from shutil import copyfile
 from typing import Optional, Tuple, List