diff --git a/agent/component/message.py b/agent/component/message.py
index ac1d2beae..e177ecf65 100644
--- a/agent/component/message.py
+++ b/agent/component/message.py
@@ -39,6 +39,7 @@ class MessageParam(ComponentParamBase):
         self.content = []
         self.stream = True
         self.output_format = None  # default output format
+        self.auto_play = False
         self.outputs = {
             "content": {
                 "type": "str"