diff --git a/core/lib/Drupal/Core/Template/Attribute.php b/core/lib/Drupal/Core/Template/Attribute.php
index 1951d57..ad4e1b1 100644
--- a/core/lib/Drupal/Core/Template/Attribute.php
+++ b/core/lib/Drupal/Core/Template/Attribute.php
@@ -40,7 +40,7 @@
  * @endcode
  *
  * The attribute keys and values are automatically sanitized for output with
- * \Drupal\Component\Utility\SafeMarkup::checkPlain().
+ * htmlspecialchars() and the entire attribute string is marked safe for output.
  */
 class Attribute implements \ArrayAccess, \IteratorAggregate {