diff --git a/cocos/2d/CCLabelTTF.cpp b/cocos/2d/CCLabelTTF.cpp
index 0ad1cb1cb3..3636a84a74 100644
--- a/cocos/2d/CCLabelTTF.cpp
+++ b/cocos/2d/CCLabelTTF.cpp
@@ -161,7 +161,7 @@ int LabelTTF::getFontSize() const
     return _renderLabel->getFontSize();
 }
 
-void LabelTTF::setFontSize(int fontSize)
+void LabelTTF::setFontSize(float fontSize)
 {
     _renderLabel->setFontSize(fontSize);
     _contentDirty = true;
diff --git a/cocos/2d/CCLabelTTF.h b/cocos/2d/CCLabelTTF.h
index 45bed7196e..f70268eb59 100644
--- a/cocos/2d/CCLabelTTF.h
+++ b/cocos/2d/CCLabelTTF.h
@@ -131,7 +131,7 @@ public:
     void setDimensions(const Size &dim);
     
     int getFontSize() const;
-    void setFontSize(int fontSize);
+    void setFontSize(float fontSize);
     
     const std::string& getFontName() const;
     void setFontName(const std::string& fontName);