diff --git a/takway/clients/web_socket_client_utils.py b/takway/clients/web_socket_client_utils.py
index 53a046c..f38f6b8 100644
--- a/takway/clients/web_socket_client_utils.py
+++ b/takway/clients/web_socket_client_utils.py
@@ -224,7 +224,7 @@ class WebSocketClinet:
                     if is_speech:
                         # print(f"{datetime.now()}: valid voice")
                         slience_bgn_t = time.time()
-                    frames.append(data)
+                        frames.append(data)
 
                     slience_time = time.time() - slience_bgn_t