Add missing import

diff --git a/wcfsetup/install/files/lib/system/background/BackgroundQueueHandler.class.php b/wcfsetup/install/files/lib/system/background/BackgroundQueueHandler.class.php
index c284961a195ca78714d76e58d37867dae0240df3..042ca28abf4d2221c4ce8da3f7f7598baf347633 100644 (file)
--- a/wcfsetup/install/files/lib/system/background/BackgroundQueueHandler.class.php
+++ b/wcfsetup/install/files/lib/system/background/BackgroundQueueHandler.class.php
@@ -4,6 +4,7 @@ use wcf\data\user\User;
 use wcf\system\background\job\AbstractBackgroundJob;
 use wcf\system\exception\LoggedException;
 use wcf\system\exception\SystemException;
+use wcf\system\session\SessionHandler;
 use wcf\system\SingletonFactory;
 use wcf\system\WCF;