diff --git a/egs/alimeeting/ASR/pruned_transducer_stateless2/asr_datamodule.py b/egs/alimeeting/ASR/pruned_transducer_stateless2/asr_datamodule.py
index 15acc6fcec..4107412156 100644
--- a/egs/alimeeting/ASR/pruned_transducer_stateless2/asr_datamodule.py
+++ b/egs/alimeeting/ASR/pruned_transducer_stateless2/asr_datamodule.py
@@ -290,7 +290,6 @@ def train_dataloaders(
                 num_buckets=self.args.num_buckets,
                 buffer_size=self.args.num_buckets * 2000,
                 shuffle_buffer_size=self.args.num_buckets * 5000,
-                buffer_size=30000,
                 drop_last=True,
             )
         else: