diff --git a/components/form/FormItem.jsx b/components/form/FormItem.jsx
index 6c8cfd10ca..2b7a03524e 100644
--- a/components/form/FormItem.jsx
+++ b/components/form/FormItem.jsx
@@ -116,7 +116,7 @@ class FormItem extends React.Component {
 
     const className = classNames({
       [this._getLayoutClass(labelCol)]: true,
-      'label-required': required,
+      [`${props.prefixCls}-item-required`]: required,
     });
 
     return props.label ? (
diff --git a/components/form/demo/horizontal-form.md b/components/form/demo/horizontal-form.md
index c7b7a260a4..7e6bd219ca 100644
--- a/components/form/demo/horizontal-form.md
+++ b/components/form/demo/horizontal-form.md
@@ -36,7 +36,7 @@ let Demo = React.createClass({
         <FormItem
           label="您的性别："
           labelCol={{ span: 6 }}
-          wrapperCol={{ span: 14 }}d>
+          wrapperCol={{ span: 14 }}>
             <RadioGroup {...getFieldProps('gender', { initialValue: 'female' })}>
               <Radio value="male">男的</Radio>
               <Radio value="female">女的</Radio>
@@ -50,7 +50,7 @@ let Demo = React.createClass({
           <Input type="textarea" placeholder="随便写" {...getFieldProps('remark')} />
         </FormItem>
         <FormItem
-          wrapperCol={{ span: 14, offset: 6 }} >
+          wrapperCol={{ span: 14, offset: 6 }}>
           <label>
             <Checkbox {...getFieldProps('agreement')} />同意
           </label>
diff --git a/style/components/form.less b/style/components/form.less
index ad306cc78f..6ba8d870cf 100644
--- a/style/components/form.less
+++ b/style/components/form.less
@@ -11,7 +11,7 @@ label {
   }
 }
 
-.label-required:before {
+.@{css-prefix}form-item-required:before {
   display: inline-block;
   margin-right: 4px;
   content: "*";