diff --git a/egs/librispeech/ASR/pruned_transducer_stateless7/train.py b/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
index 148e3a8cf..9cafe7047 100755
--- a/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
+++ b/egs/librispeech/ASR/pruned_transducer_stateless7/train.py
@@ -162,7 +162,7 @@ def add_model_arguments(parser: argparse.ArgumentParser):
     parser.add_argument(
         "--pos-dim",
         type=int,
-        default="384",
+        default="128",
         help="Positional-encoding embedding dimension"
     )