diff --git a/docs/en/topics/form-validation.md b/docs/en/topics/form-validation.md
index a99a3b421..66c8b50a5 100644
--- a/docs/en/topics/form-validation.md
+++ b/docs/en/topics/form-validation.md
@@ -25,7 +25,7 @@ when the form is submitted.
 			new RequiredFields(array('MyRequiredField'))
 		);
 		// Optional: Add a CSS class for custom styling
-		$form->dataFieldByName('MyRequiredField)->addExtraClass('required');
+		$form->dataFieldByName('MyRequiredField')->addExtraClass('required');
 		return $form;
 	}
 
@@ -141,4 +141,4 @@ errors.
 
 ## Related
 
- * Model Validation with [api:DataObject->validate()]
\ No newline at end of file
+ * Model Validation with [api:DataObject->validate()]