diff --git a/app/javascript/widget/components/PreChat/Form.vue b/app/javascript/widget/components/PreChat/Form.vue
index 1649068c6..3da347966 100644
--- a/app/javascript/widget/components/PreChat/Form.vue
+++ b/app/javascript/widget/components/PreChat/Form.vue
@@ -245,6 +245,7 @@ export default {
         text: null,
         select: null,
         number: null,
+        checkbox: false,
       };
       const validationKeys = Object.keys(validations);
       const validation = 'bail|required';