diff --git a/resources/lib/UnityUser.php b/resources/lib/UnityUser.php
index 4172ef41..594e7af6 100644
--- a/resources/lib/UnityUser.php
+++ b/resources/lib/UnityUser.php
@@ -73,7 +73,7 @@ public function init($send_mail = true)
             $ldapUserEntry->setAttribute("sn", $this->getLastname());
             $ldapUserEntry->setAttribute(
                 "gecos",
-                transliterator_transliterate("Latin-ASCII", "{$this->getFirstname()} {$this->getLastname()}")
+                \transliterator_transliterate("Latin-ASCII", "{$this->getFirstname()} {$this->getLastname()}")
             );
             $ldapUserEntry->setAttribute("mail", $this->getMail());
             $ldapUserEntry->setAttribute("o", $this->getOrg());