diff --git a/src/Extension/H264.h b/src/Extension/H264.h
index 4f7a3e90..3a202b54 100644
--- a/src/Extension/H264.h
+++ b/src/Extension/H264.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).
@@ -128,6 +128,7 @@ public:
     int getVideoHeight() const override;
     int getVideoWidth() const override;
     float getVideoFps() const override;
+    void flush()  override;
     bool inputFrame(const Frame::Ptr &frame) override;
 
 private: