diff --git a/egs/aishell/ASR/pruned_transducer_stateless7_streaming/decode.py b/egs/aishell/ASR/pruned_transducer_stateless7_streaming/decode.py
index 99110d6b6e..0e783e92b9 100755
--- a/egs/aishell/ASR/pruned_transducer_stateless7_streaming/decode.py
+++ b/egs/aishell/ASR/pruned_transducer_stateless7_streaming/decode.py
@@ -250,7 +250,7 @@ def get_parser():
     parser.add_argument(
         "--context-size",
         type=int,
-        default=1,
+        default=2,
         help="The context size in the decoder. 1 means bigram; 2 means tri-gram",
     )
     parser.add_argument(