diff --git a/basic/2/P02.html b/basic/2/P02.html
index e3584baac..5006a9b03 100644
--- a/basic/2/P02.html
+++ b/basic/2/P02.html
@@ -26,7 +26,7 @@
                 return(
                     <div>
                         {/*这种内联函数，更新会多次调用 时有bug */}
-                        <input type="text" ref={c=>this.haha=c}/>
+                        <input type="text" ref={(c)=>this.haha=c}/>
                         <button  onClick={this.haha1}>点我</button>
                     </div>
                 )