diff --git a/server/imserver/player.h b/server/imserver/player.h
index 574fbff..e175b9d 100644
--- a/server/imserver/player.h
+++ b/server/imserver/player.h
@@ -125,6 +125,7 @@ private:
     timer_list* dirty_timer_ = nullptr;
     timer_list* update_user_info_timer_ = nullptr;
     long long last_apply_idx_ = 0;
+    long long last_event_idx_ = 0;
 
     std::map<std::string, Friend*> friend_hash_;
     std::map<long long, FriendApply*> apply_hash_;