diff --git a/src/BootstrapTable.js b/src/BootstrapTable.js
index ecee1a47a..9af70087b 100644
--- a/src/BootstrapTable.js
+++ b/src/BootstrapTable.js
@@ -468,7 +468,7 @@ BootstrapTable.defaultProps = {
   search: false,
   columnFilter: false,
   options: {
-    sortName: null,
+    sortName: undefined,
     sortOrder: Const.SORT_DESC,
     afterTableComplete: undefined,
     afterDeleteRow: undefined,
diff --git a/src/TableHeader.js b/src/TableHeader.js
index 0decd33d9..4b5375032 100644
--- a/src/TableHeader.js
+++ b/src/TableHeader.js
@@ -23,7 +23,7 @@ class TableHeader extends React.Component{
 
   componentDidMount(){
     //default sorting
-    if(this.props.sortName !== null){
+    if(this.props.sortName){
       this.clearSortCaret(this.props.sortOrder, this.props.sortName);
       var row = this.refs.header.getDOMNode();
       for(var i=0;i<row.childElementCount;i++){