diff --git a/components/input-number/index.jsx b/components/input-number/index.jsx
index 1cf80e56ba..cf7fb0aee9 100644
--- a/components/input-number/index.jsx
+++ b/components/input-number/index.jsx
@@ -14,6 +14,6 @@ export default React.createClass({
     } else if (this.props.size === 'small') {
       sizeClass = 'ant-input-number-sm';
     }
-    return <InputNumber className={sizeClass} style={{width: 90}} {...this.props} />;
+    return <InputNumber className={sizeClass} {...this.props} />;
   }
 });
diff --git a/style/components/inputNumber.less b/style/components/inputNumber.less
index 95c21e930f..e9940462b1 100644
--- a/style/components/inputNumber.less
+++ b/style/components/inputNumber.less
@@ -15,6 +15,7 @@
   border: 1px solid #D9D9D9;
   border-radius: @border-radius-base;
   overflow: hidden;
+  width: 90px;
 
   &-handler {
     text-align: center;