diff --git a/interface/inner_api/common/event.h b/interface/inner_api/common/event.h
index e1f1c43f4092c63c1102659fb6be0b7e2846a01b..abe998ad9686e7e89c17f9d62bdd755bdf4c512b 100644
--- a/interface/inner_api/common/event.h
+++ b/interface/inner_api/common/event.h
@@ -51,6 +51,9 @@ enum struct EventType : uint32_t {
     EVENT_AUDIO_TRACK_CHANGE,
     EVENT_VIDEO_TRACK_CHANGE,
     EVENT_SUBTITLE_TRACK_CHANGE,
+    EVENT_VIDEO_LAG, // player lag event detected by video sink
+    EVENT_AUDIO_LAG, // player lag event detected by audio sink
+    EVENT_STREAM_LAG, // player lag event detected by sync manager
 };
 
 struct Event {