diff --git a/egs/multi_zh-hans/ASR/zipformer/decode.py b/egs/multi_zh-hans/ASR/zipformer/decode.py
index adfd751b6..710d59553 100755
--- a/egs/multi_zh-hans/ASR/zipformer/decode.py
+++ b/egs/multi_zh-hans/ASR/zipformer/decode.py
@@ -737,6 +737,7 @@ def save_results(
 def main():
     parser = get_parser()
     AsrDataModule.add_arguments(parser)
+    LmScorer.add_arguments(parser)
     args = parser.parse_args()
     args.exp_dir = Path(args.exp_dir)