diff --git a/cocos2dx/platform/CCAccelerometerDelegate.h b/cocos2dx/platform/CCAccelerometerDelegate.h
index 6890bb2e6c..584c651cff 100644
--- a/cocos2dx/platform/CCAccelerometerDelegate.h
+++ b/cocos2dx/platform/CCAccelerometerDelegate.h
@@ -39,6 +39,8 @@ public:
     double z;
 
     double timestamp;
+    
+    CCAcceleration(): x(0), y(0), z(0), timestamp(0) {}
 };
 
 /**