From 2563e32bb12b363c41d608bf0f6f1060ea769f8b Mon Sep 17 00:00:00 2001
From: qijun <qijun1994@hotmail.com>
Date: Wed, 30 Aug 2017 17:57:26 +0800
Subject: [PATCH] fix clang build error

---
 paddle/gserver/layers/CostLayer.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/paddle/gserver/layers/CostLayer.h b/paddle/gserver/layers/CostLayer.h
index 0ce72ef40a5..0f655b48eea 100644
--- a/paddle/gserver/layers/CostLayer.h
+++ b/paddle/gserver/layers/CostLayer.h
@@ -318,7 +318,9 @@ public:
 
   void forwardImp(Matrix& output, Argument& label, Matrix& cost) override;
 
-  void backwardImp(Matrix& outputValue, Argument& label, Matrix& outputGrad) {}
+  void backwardImp(Matrix& outputValue,
+                   Argument& label,
+                   Matrix& outputGrad) override {}
 };
 
 /**
-- 
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