diff --git a/paddle/gserver/layers/CudnnPoolLayer.h b/paddle/gserver/layers/CudnnPoolLayer.h
index 28294f5aa30ca443dbdc2bf27eb089f55caedc18..f0aa22fe3af90c9233330c15fc56c3696a624446 100644
--- a/paddle/gserver/layers/CudnnPoolLayer.h
+++ b/paddle/gserver/layers/CudnnPoolLayer.h
@@ -54,8 +54,8 @@ public:
    * So reshaping is needed.
    */
   void reshape(int batchSize);
-  virtual void forward(PassType passType) override;
-  virtual void backward(const UpdateCallback& callback = nullptr) override;
+  void forward(PassType passType) override;
+  void backward(const UpdateCallback& callback = nullptr) override;
 };
 
 }  // namespace paddle