diff --git a/interface/inner_api/plugin/plugin_event.h b/interface/inner_api/plugin/plugin_event.h
index 96b3e67df3717b43abfcb28da7c48c9fe42b94ce..8a11493825f4bafe8a0e5f74f130950970346f04 100644
--- a/interface/inner_api/plugin/plugin_event.h
+++ b/interface/inner_api/plugin/plugin_event.h
@@ -44,6 +44,7 @@ enum struct PluginEventType : int32_t {
     EVENT_BUFFER_PROGRESS,
     INITIAL_BUFFER_SUCCESS,
     DASH_SEEK_READY,
+    AUDIO_OUTPUT_FORMAT_CHANGED,
 };
 
 enum class NetworkClientErrorCode : int32_t {