Fixed missing use

diff --git a/wcfsetup/install/files/lib/system/package/plugin/UserGroupOptionsPackageInstallationPlugin.class.php b/wcfsetup/install/files/lib/system/package/plugin/UserGroupOptionsPackageInstallationPlugin.class.php
index e8953f821577b5059f2d4d2165f49a28ccc3222a..1c34e033207276adbc092fd34011a35be1bc060a 100644 (file)
--- a/wcfsetup/install/files/lib/system/package/plugin/UserGroupOptionsPackageInstallationPlugin.class.php
+++ b/wcfsetup/install/files/lib/system/package/plugin/UserGroupOptionsPackageInstallationPlugin.class.php
@@ -4,6 +4,7 @@ use wcf\data\user\group\option\UserGroupOption;
 use wcf\data\user\group\option\UserGroupOptionEditor;
 use wcf\data\user\group\UserGroup;
 use wcf\system\WCF;
+use wcf\util\StringUtil;
 
 /**
  * This PIP installs, updates or deletes user group permissions.