diff --git a/egs/aishell/ASR/pruned_transducer_stateless3/decode.py b/egs/aishell/ASR/pruned_transducer_stateless3/decode.py
index f686174f38..6aea306c8f 100755
--- a/egs/aishell/ASR/pruned_transducer_stateless3/decode.py
+++ b/egs/aishell/ASR/pruned_transducer_stateless3/decode.py
@@ -464,6 +464,7 @@ def main():
 
     params = get_params()
     params.update(vars(args))
+    params.datatang_prob = 0
 
     assert params.decoding_method in (
         "greedy_search",
diff --git a/egs/aishell/ASR/pruned_transducer_stateless3/export.py b/egs/aishell/ASR/pruned_transducer_stateless3/export.py
index 307895a765..566902a85e 100755
--- a/egs/aishell/ASR/pruned_transducer_stateless3/export.py
+++ b/egs/aishell/ASR/pruned_transducer_stateless3/export.py
@@ -157,6 +157,7 @@ def main():
 
     params.blank_id = 0
     params.vocab_size = max(lexicon.tokens) + 1
+    params.datatang_prob = 0
 
     logging.info(params)
 
diff --git a/egs/aishell/ASR/pruned_transducer_stateless3/pretrained.py b/egs/aishell/ASR/pruned_transducer_stateless3/pretrained.py
index 5cda411bc1..04a0a882a8 100755
--- a/egs/aishell/ASR/pruned_transducer_stateless3/pretrained.py
+++ b/egs/aishell/ASR/pruned_transducer_stateless3/pretrained.py
@@ -223,6 +223,7 @@ def main():
 
     params.blank_id = 0
     params.vocab_size = max(lexicon.tokens) + 1
+    params.datatang_prob = 0
 
     logging.info(params)