diff --git a/cosyvoice/cli/model.py b/cosyvoice/cli/model.py
index 92a15d985..0363bc9fb 100644
--- a/cosyvoice/cli/model.py
+++ b/cosyvoice/cli/model.py
@@ -342,10 +342,11 @@ def tts(self, text=torch.zeros(1, 0, dtype=torch.int32), flow_embedding=torch.ze
         p.start()
         if stream is True:
             token_offset = 0
-            prompt_token_pad = int(np.ceil(flow_prompt_speech_token.shape[1] / self.token_hop_len) * self.token_hop_len - flow_prompt_speech_token.shape[1])
+            token_hop_len = self.token_hop_len
+            prompt_token_pad = int(np.ceil(flow_prompt_speech_token.shape[1] / token_hop_len) * token_hop_len - flow_prompt_speech_token.shape[1])
             while True:
                 time.sleep(0.1)
-                this_token_hop_len = self.token_hop_len + prompt_token_pad if token_offset == 0 else self.token_hop_len
+                this_token_hop_len = token_hop_len + prompt_token_pad if token_offset == 0 else token_hop_len
                 if len(self.tts_speech_token_dict[this_uuid]) - token_offset >= this_token_hop_len + self.flow.pre_lookahead_len:
                     this_tts_speech_token = torch.tensor(self.tts_speech_token_dict[this_uuid][:token_offset + this_token_hop_len + self.flow.pre_lookahead_len]).unsqueeze(dim=0)
                     this_tts_speech = self.token2wav(token=this_tts_speech_token,
@@ -357,7 +358,7 @@ def tts(self, text=torch.zeros(1, 0, dtype=torch.int32), flow_embedding=torch.ze
                                                      stream=stream,
                                                      finalize=False)
                     token_offset += this_token_hop_len
-                    self.token_hop_len = min(self.token_max_hop_len, self.token_hop_len * self.stream_scale_factor)
+                    token_hop_len = min(self.token_max_hop_len, token_hop_len * self.stream_scale_factor)
                     yield {'tts_speech': this_tts_speech.cpu()}
                 if self.llm_end_dict[this_uuid] is True and len(self.tts_speech_token_dict[this_uuid]) - token_offset < this_token_hop_len + self.flow.pre_lookahead_len:
                     break