diff --git a/cocos2dx/CCDirector.h b/cocos2dx/CCDirector.h
index 88b05e95f6..8f44a6a862 100644
--- a/cocos2dx/CCDirector.h
+++ b/cocos2dx/CCDirector.h
@@ -328,7 +328,7 @@ public:
 
     /** KeyboardDispatcher associated with this director
      @note Supported on Mac and Linux only now.
-     @since v?.?
+     @since v3.0
      */
     CC_PROPERTY(KeyboardDispatcher*, _keyboardDispatcher, KeyboardDispatcher);