diff --git a/webrtc/WebRtcTransport.h b/webrtc/WebRtcTransport.h
index a5bd4147..7a1cc63e 100644
--- a/webrtc/WebRtcTransport.h
+++ b/webrtc/WebRtcTransport.h
@@ -1,4 +1,4 @@
-/*
+/*
  * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
  *
  * This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
@@ -262,6 +262,7 @@ protected:
     void onShutdown(const SockException &ex) override;
     virtual void onRecvRtp(MediaTrack &track, const std::string &rid, mediakit::RtpPacket::Ptr rtp) = 0;
     void updateTicker();
+    int getLossRate(mediakit::TrackType type);
 
 private:
     void onSortedRtp(MediaTrack &track, const std::string &rid, mediakit::RtpPacket::Ptr rtp);