diff --git a/Civi/Core/CiviEventDispatcher.php b/Civi/Core/CiviEventDispatcher.php
index 8d7240fe0ffd..d8db0119bc63 100644
--- a/Civi/Core/CiviEventDispatcher.php
+++ b/Civi/Core/CiviEventDispatcher.php
@@ -98,7 +98,7 @@ public function addSubscriberServiceMap(string $subscriber, array $events) {
    *   Ex: 'hook_civicrm_publicEvent'
    *   Ex: '&hook_civicrm_publicEvent' (an alias for 'hook_civicrm_publicEvent' in which the listener abides hook-style ordered parameters).
    *        This notation is handy when attaching via listener-maps (e.g. `getSubscribedEvents()`).
-   * @param callable $listener
+   * @param callable|HookStyleListener $listener
    * @param int $priority
    */
   public function addListener($eventName, $listener, $priority = 0) {
diff --git a/Civi/Core/Event/HookStyleListener.php b/Civi/Core/Event/HookStyleListener.php
index 28a3ee85a8d6..ed19e70e011a 100644
--- a/Civi/Core/Event/HookStyleListener.php
+++ b/Civi/Core/Event/HookStyleListener.php
@@ -22,7 +22,7 @@ class HookStyleListener {
   private $callback = NULL;
 
   /**
-   * @param array $callback
+   * @param array|callable $callback
    *   Ex: ['SomeClass', 'someMethod']
    */
   public function __construct($callback) {