diff --git a/library/Icinga/Authentication/User/LdapUserBackend.php b/library/Icinga/Authentication/User/LdapUserBackend.php
index b525d111f..6a2cacff8 100644
--- a/library/Icinga/Authentication/User/LdapUserBackend.php
+++ b/library/Icinga/Authentication/User/LdapUserBackend.php
@@ -4,6 +4,7 @@
 namespace Icinga\Authentication\User;
 
 use DateTime;
+use Exception;
 use Icinga\Data\ConfigObject;
 use Icinga\Data\Inspectable;
 use Icinga\Data\Inspection;