diff --git a/paddlespeech/server/engine/asr/online/python/asr_engine.py b/paddlespeech/server/engine/asr/online/python/asr_engine.py
index 87d88ee602bc1ec7bc1af8fc96153926bc98045c..4c7c4b37a5412c4ff4f5a41dba0b9227a2108d11 100644
--- a/paddlespeech/server/engine/asr/online/python/asr_engine.py
+++ b/paddlespeech/server/engine/asr/online/python/asr_engine.py
@@ -613,7 +613,8 @@ class PaddleASRConnectionHanddler:
         encoder_out = self.encoder_out.repeat(beam_size, 1, 1)
         encoder_mask = paddle.ones(
             (beam_size, 1, encoder_out.shape[1]), dtype=paddle.bool)
-        decoder_out, _ = self.model.decoder(
+
+        decoder_out, _, _ = self.model.decoder(
             encoder_out, encoder_mask, hyps_pad,
             hyps_lens)  # (beam_size, max_hyps_len, vocab_size)
         # ctc score in ln domain