diff --git a/src/components/EditorWidgets/List/ListControl.js b/src/components/EditorWidgets/List/ListControl.js
index aec504eba38b..7ff6dc15d9bc 100644
--- a/src/components/EditorWidgets/List/ListControl.js
+++ b/src/components/EditorWidgets/List/ListControl.js
@@ -194,7 +194,7 @@ export default class ListControl extends Component {
     const singleField = field.get('field');
     const labelField = (multiFields && multiFields.first()) || singleField;
     const value = multiFields ? item.get(multiFields.first().get('name')) : singleField.get('label');
-    return value || `No ${ labelField.get('name') }`;
+    return (value || `No ${ labelField.get('name') }`).toString();
   }
 
   onSortEnd = ({ oldIndex, newIndex }) => {