diff --git a/apps/files_sharing/lib/AppInfo/Application.php b/apps/files_sharing/lib/AppInfo/Application.php
index 6448d0fab4..fd71f58f12 100644
--- a/apps/files_sharing/lib/AppInfo/Application.php
+++ b/apps/files_sharing/lib/AppInfo/Application.php
@@ -59,6 +59,7 @@ use OCP\IServerContainer;
 use OCP\Share\Events\ShareCreatedEvent;
 use OCP\Util;
 use Psr\Container\ContainerInterface;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\EventDispatcher\GenericEvent;
 
 class Application extends App {
@@ -74,6 +75,7 @@ class Application extends App {
 
 		/** @var IEventDispatcher $dispatcher */
 		$dispatcher = $container->query(IEventDispatcher::class);
+		$oldDispatcher = $container->getServer()->getEventDispatcher();
 		$mountProviderCollection = $server->getMountProviderCollection();
 		$notifications = $server->getNotificationManager();
 
@@ -124,7 +126,7 @@ class Application extends App {
 		$notifications->registerNotifierService(Notifier::class);
 
 		$this->registerMountProviders($mountProviderCollection);
-		$this->registerEventsScripts($dispatcher);
+		$this->registerEventsScripts($dispatcher, $oldDispatcher);
 		$this->setupSharingMenus();
 
 		/**
@@ -138,7 +140,7 @@ class Application extends App {
 		$mountProviderCollection->registerProvider($this->getContainer()->query('ExternalMountProvider'));
 	}
 
-	protected function registerEventsScripts(IEventDispatcher $dispatcher) {
+	protected function registerEventsScripts(IEventDispatcher $dispatcher, EventDispatcherInterface $oldDispatcher) {
 		// sidebar and files scripts
 		$dispatcher->addServiceListener(LoadAdditionalScriptsEvent::class, LoadAdditionalListener::class);
 		$dispatcher->addServiceListener(BeforeTemplateRenderedEvent::class, LegacyBeforeTemplateRenderedListener::class);
@@ -151,12 +153,12 @@ class Application extends App {
 		$dispatcher->addServiceListener(UserAddedEvent::class, UserAddedToGroupListener::class);
 
 		// notifications api to accept incoming user shares
-		$dispatcher->addListener('OCP\Share::postShare', function (GenericEvent $event) {
+		$oldDispatcher->addListener('OCP\Share::postShare', function (GenericEvent $event) {
 			/** @var Listener $listener */
 			$listener = $this->getContainer()->query(Listener::class);
 			$listener->shareNotification($event);
 		});
-		$dispatcher->addListener(IGroup::class . '::postAddUser', function (GenericEvent $event) {
+		$oldDispatcher->addListener(IGroup::class . '::postAddUser', function (GenericEvent $event) {
 			/** @var Listener $listener */
 			$listener = $this->getContainer()->query(Listener::class);
 			$listener->userAddedToGroup($event);
diff --git a/apps/lookup_server_connector/lib/AppInfo/Application.php b/apps/lookup_server_connector/lib/AppInfo/Application.php
index 1cd999eae8..707a06af6f 100644
--- a/apps/lookup_server_connector/lib/AppInfo/Application.php
+++ b/apps/lookup_server_connector/lib/AppInfo/Application.php
@@ -35,9 +35,9 @@ use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
 use OCP\AppFramework\Bootstrap\IRegistrationContext;
-use OCP\EventDispatcher\IEventDispatcher;
 use OCP\AppFramework\IAppContainer;
 use OCP\IUser;
+use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\GenericEvent;
 
 class Application extends App implements IBootstrap {
@@ -57,7 +57,7 @@ class Application extends App implements IBootstrap {
 	/**
 	 * @todo move the OCP events and then move the registration to `register`
 	 */
-	private function registerEventListeners(IEventDispatcher $dispatcher,
+	private function registerEventListeners(EventDispatcher $dispatcher,
 											IAppContainer $appContainer): void {
 		$dispatcher->addListener('OC\AccountManager::userUpdated', function (GenericEvent $event) use ($appContainer) {
 			/** @var IUser $user */
diff --git a/core/Application.php b/core/Application.php
index 2e2579f094..a452ca9677 100644
--- a/core/Application.php
+++ b/core/Application.php
@@ -73,7 +73,9 @@ class Application extends App {
 		$notificationManager->registerNotifierService(RemoveLinkSharesNotifier::class);
 		$notificationManager->registerNotifierService(AuthenticationNotifier::class);
 
-		$eventDispatcher->addListener(IDBConnection::CHECK_MISSING_INDEXES_EVENT,
+		$oldEventDispatcher = $server->getEventDispatcher();
+
+		$oldEventDispatcher->addListener(IDBConnection::CHECK_MISSING_INDEXES_EVENT,
 			function (GenericEvent $event) use ($container) {
 				/** @var MissingIndexInformation $subject */
 				$subject = $event->getSubject();
@@ -179,7 +181,7 @@ class Application extends App {
 			}
 		);
 
-		$eventDispatcher->addListener(IDBConnection::CHECK_MISSING_COLUMNS_EVENT,
+		$oldEventDispatcher->addListener(IDBConnection::CHECK_MISSING_COLUMNS_EVENT,
 			function (GenericEvent $event) use ($container) {
 				/** @var MissingColumnInformation $subject */
 				$subject = $event->getSubject();
diff --git a/lib/public/EventDispatcher/IEventDispatcher.php b/lib/public/EventDispatcher/IEventDispatcher.php
index 095178f16e..6f3adf159c 100644
--- a/lib/public/EventDispatcher/IEventDispatcher.php
+++ b/lib/public/EventDispatcher/IEventDispatcher.php
@@ -39,6 +39,7 @@ interface IEventDispatcher {
 	 * @param string $eventName preferably the fully-qualified class name of the Event sub class
 	 * @psalm-param string|class-string<T> $eventName preferably the fully-qualified class name of the Event sub class
 	 * @param callable $listener the object that is invoked when a matching event is dispatched
+	 * @psalm-param callable(T):void $listener
 	 * @param int $priority
 	 *
 	 * @since 17.0.0
@@ -50,6 +51,7 @@ interface IEventDispatcher {
 	 * @param string $eventName preferably the fully-qualified class name of the Event sub class
 	 * @psalm-param string|class-string<T> $eventName preferably the fully-qualified class name of the Event sub class
 	 * @param callable $listener the object that is invoked when a matching event is dispatched
+	 * @psalm-param callable(T):void $listener
 	 *
 	 * @since 19.0.0
 	 */