diff --git a/egs/aishell/ASR/zipformer_bbpe/decode.py b/egs/aishell/ASR/zipformer_bbpe/decode.py
index 443782278..11e5bb5ea 100755
--- a/egs/aishell/ASR/zipformer_bbpe/decode.py
+++ b/egs/aishell/ASR/zipformer_bbpe/decode.py
@@ -176,7 +176,7 @@ def get_parser():
 
     parser.add_argument(
         "--bpe-model",
-        type=Path,
+        type=str,
         default="data/lang_bbpe_500/bbpe.model",
         help="Path to the byte BPE model",
     )