diff --git a/src/form-builder-controls.js b/src/form-builder-controls.js
index 46a8ca53e..fa36cd71e 100755
--- a/src/form-builder-controls.js
+++ b/src/form-builder-controls.js
@@ -222,6 +222,7 @@ export default [
           allowMultiSelect: false,
           selectedOptions: [],
           optionsList: [],
+          optionsListExtra: [],
           key:'value',
           value:'content',
           ariaLabel: 'ariaLabel',