diff --git a/components/auto-complete/index.jsx b/components/auto-complete/index.jsx
index 4dc8167e6a..705f473f04 100644
--- a/components/auto-complete/index.jsx
+++ b/components/auto-complete/index.jsx
@@ -43,7 +43,7 @@ const AutoComplete = {
   name: 'AAutoComplete',
   props: {
     ...AutoCompleteProps,
-    prefixCls: PropTypes.string.def('ant-select'),
+    prefixCls: PropTypes.string,
     showSearch: PropTypes.bool.def(false),
     transitionName: PropTypes.string.def('slide-up'),
     choiceTransitionName: PropTypes.string.def('zoom'),