diff --git a/wcfsetup/install/files/lib/acp/page/LicensePage.class.php b/wcfsetup/install/files/lib/acp/page/LicensePage.class.php
index 8fda1c2c24..631e832b5b 100644
--- a/wcfsetup/install/files/lib/acp/page/LicensePage.class.php
+++ b/wcfsetup/install/files/lib/acp/page/LicensePage.class.php
@@ -69,7 +69,9 @@ public function readData()
         parent::readData();
 
         if (PackageUpdateServer::isUpgradeOverrideEnabled()) {
-            throw new NamedUserException();
+            throw new NamedUserException(HtmlString::fromSafeHtml(
+                WCF::getLanguage()->get('wcf.acp.license.error.upgradeOverrideEnabled')
+            ));
         }
 
         if (!LicenseApi::hasLicenseCredentials()) {