diff --git a/cocos2dx/platform/ios/AccelerometerDelegateWrapper.mm b/cocos2dx/platform/ios/AccelerometerDelegateWrapper.mm
index 4ad4f33269..322693aaf2 100644
--- a/cocos2dx/platform/ios/AccelerometerDelegateWrapper.mm
+++ b/cocos2dx/platform/ios/AccelerometerDelegateWrapper.mm
@@ -34,7 +34,7 @@ static AccelerometerDispatcher* s_pAccelerometerDispatcher;
 + (id) sharedAccelerometerDispather
 {
     if (s_pAccelerometerDispatcher == nil) {
-        s_pAccelerometerDispatcher = [self alloc];
+        s_pAccelerometerDispatcher = [[self alloc] init];
     }
     
     return s_pAccelerometerDispatcher;