diff --git a/core/lib/Drupal/Core/Plugin/DefaultPluginManager.php b/core/lib/Drupal/Core/Plugin/DefaultPluginManager.php
index 62260a2..a39cd53 100644
--- a/core/lib/Drupal/Core/Plugin/DefaultPluginManager.php
+++ b/core/lib/Drupal/Core/Plugin/DefaultPluginManager.php
@@ -155,7 +155,7 @@ public function setCacheBackend(CacheBackendInterface $cache_backend, $cache_key
   }
 
   /**
-   * Initializes the alter hook.
+   * Defines the name of the alter hook for plugin definitions.
    *
    * @param string $alter_hook
    *   Name of the alter hook; for example, to invoke