diff --git a/src/Server.php b/src/Server.php
index b8fd0c6..f8bb646 100644
--- a/src/Server.php
+++ b/src/Server.php
@@ -1198,7 +1198,8 @@ class Server extends CommonDBTM
             return '';
         }
         if (!isset($cache[$id])) {
-            $obj = new $classname();
+            $fqcn = '\\' . ltrim($classname, '\\');
+            $obj = new $fqcn();
             if ($obj->getFromDB($id)) {
                 $cache[$id] = (string) ($obj->fields['name'] ?? '');
             } else {