diff --git a/egs/callhome/diarization/sond/conf/basic_inference.yaml b/egs/callhome/diarization/sond/conf/basic_inference.yaml
index b45da48db..fd08c09e1 100644
--- a/egs/callhome/diarization/sond/conf/basic_inference.yaml
+++ b/egs/callhome/diarization/sond/conf/basic_inference.yaml
@@ -1,2 +1,2 @@
-diar_smooth_size: 1
+smooth_size: 1
 dur_threshold: 0
diff --git a/funasr/bin/diar_inference_launch.py b/funasr/bin/diar_inference_launch.py
index d501f6877..b655df544 100755
--- a/funasr/bin/diar_inference_launch.py
+++ b/funasr/bin/diar_inference_launch.py
@@ -453,7 +453,7 @@ def get_parser():
         help="The batch size for inference",
     )
     group.add_argument(
-        "--diar_smooth_size",
+        "--smooth_size",
         type=int,
         default=121,
         help="The smoothing size for post-processing"