diff --git a/components/form/FormItem.jsx b/components/form/FormItem.jsx
index d9c248f776..6c8cfd10ca 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,
-      required: required,
+      'label-required': required,
     });
 
     return props.label ? (
diff --git a/style/components/form.less b/style/components/form.less
index a2901ecce7..ad306cc78f 100644
--- a/style/components/form.less
+++ b/style/components/form.less
@@ -4,14 +4,6 @@
 
 label {
   position: relative;
-  &.required:before {
-    display: inline-block;
-    margin-right: 4px;
-    content: "*";
-    font-family: SimSun;
-    font-size: @font-size-base;
-    color: @label-required-color;
-  }
 
   > .@{iconfont-css-prefix} {
     vertical-align: top;
@@ -19,6 +11,15 @@ label {
   }
 }
 
+.label-required:before {
+  display: inline-block;
+  margin-right: 4px;
+  content: "*";
+  font-family: SimSun;
+  font-size: @font-size-base;
+  color: @label-required-color;
+}
+
 // Input styles
 .@{css-prefix}input {
   .input;