diff --git a/core/lib/Drupal/Core/Authentication/AuthenticationManager.php b/core/lib/Drupal/Core/Authentication/AuthenticationManager.php
index ab16ff6..510a445 100644
--- a/core/lib/Drupal/Core/Authentication/AuthenticationManager.php
+++ b/core/lib/Drupal/Core/Authentication/AuthenticationManager.php
@@ -105,12 +105,12 @@ protected function getProvider(Request $request) {
   }
 
   /**
-   * Returns the id of the challenge provider for a request.
+   * Returns the challenge provider for a request.
    *
    * @param \Symfony\Component\HttpFoundation\Request $request
    *   The incoming request.
    *
-   * @return \Drupal\Core\Authentication\AuthenticationProviderInterface
+   * @return \Drupal\Core\Authentication\AuthenticationProviderInterface|NULL
    *   The first authentication provider which applies to the request.
    *   If no application detects appropriate credentials, then NULL is returned.
    */