diff --git a/egs/tedlium2/ASR/conformer_ctc3/.conformer.py.swp b/egs/tedlium2/ASR/conformer_ctc3/.conformer.py.swp
index 9a7a12f3c..6c7dc8019 100644
Binary files a/egs/tedlium2/ASR/conformer_ctc3/.conformer.py.swp and b/egs/tedlium2/ASR/conformer_ctc3/.conformer.py.swp differ
diff --git a/egs/tedlium2/ASR/conformer_ctc3/conformer.py b/egs/tedlium2/ASR/conformer_ctc3/conformer.py
index ff113b8b0..d84e1bfee 100644
--- a/egs/tedlium2/ASR/conformer_ctc3/conformer.py
+++ b/egs/tedlium2/ASR/conformer_ctc3/conformer.py
@@ -50,6 +50,7 @@ class Conformer(Transformer):
         layer_dropout: float = 0.075,
         cnn_module_kernel: int = 15,
         aux_layer_period: int = 3,
+        group_num: int = 0,
     ) -> None:
         """
         Args: