diff --git a/egs/aishell/ASR/conformer_ctc/generate_CTC_label.py b/egs/aishell/ASR/conformer_ctc/generate_CTC_label.py
index a41921caf..7dbb1bb75 100755
--- a/egs/aishell/ASR/conformer_ctc/generate_CTC_label.py
+++ b/egs/aishell/ASR/conformer_ctc/generate_CTC_label.py
@@ -105,7 +105,7 @@ def generate_ctc_label_batch(
     supervisions = batch["supervisions"]
     nnet_output, memory, memory_key_padding_mask = model(feature, supervisions)
     return nnet_output
-    
+
 
 def generate_ctc_label_dataset(
     dl: torch.utils.data.DataLoader,