diff --git a/egs/aishell4/ASR/pruned_transducer_stateless5/asr_datamodule.py b/egs/aishell4/ASR/pruned_transducer_stateless5/asr_datamodule.py
index 9c302371d..c10456da5 100644
--- a/egs/aishell4/ASR/pruned_transducer_stateless5/asr_datamodule.py
+++ b/egs/aishell4/ASR/pruned_transducer_stateless5/asr_datamodule.py
@@ -308,7 +308,6 @@ class Aishell4AsrDataModule:
                 num_buckets=self.args.num_buckets,
                 buffer_size=self.args.num_buckets * 2000,
                 shuffle_buffer_size=self.args.num_buckets * 5000,
-                buffer_size=100000,
                 drop_last=self.args.drop_last,
             )
         else: