diff --git a/website/content/docs/custom-widgets.md b/website/content/docs/custom-widgets.md
index 89b6f95f..ddf97f8e 100644
--- a/website/content/docs/custom-widgets.md
+++ b/website/content/docs/custom-widgets.md
@@ -154,7 +154,7 @@ Existing error:
 ```javascript
   isValid = () => {
     // Do internal validation
-    return { error: 'Your error message.' };
+    return { error: { message: 'Your error message.' } };
   };
 ```