diff --git a/docs/decorator.md b/docs/decorator.md
index 262016f..cb8517a 100644
--- a/docs/decorator.md
+++ b/docs/decorator.md
@@ -309,13 +309,13 @@ function foo() {
 上面的代码，意图是执行后`counter`等于 1，但是实际上结果是`counter`等于 0。因为函数提升，使得实际执行的代码是下面这样。
 
 ```javascript
+var counter;
+var add;
+
 @add
 function foo() {
 }
 
-var counter;
-var add;
-
 counter = 0;
 
 add = function () {