diff --git a/egs/aishell4/ASR/zipformer/streaming_decode.py b/egs/aishell4/ASR/zipformer/streaming_decode.py
index bd3c6fb78..f0b2bb26d 100755
--- a/egs/aishell4/ASR/zipformer/streaming_decode.py
+++ b/egs/aishell4/ASR/zipformer/streaming_decode.py
@@ -388,11 +388,7 @@ def streaming_forward(
     Returns encoder outputs, output lengths, and updated states.
     """
     cached_embed_left_pad = states[-2]
-    (
-        x,
-        x_lens,
-        new_cached_embed_left_pad,
-    ) = model.encoder_embed.streaming_forward(
+    (x, x_lens, new_cached_embed_left_pad,) = model.encoder_embed.streaming_forward(
         x=features,
         x_lens=feature_lens,
         cached_left_pad=cached_embed_left_pad,