diff --git a/library/Director/Objects/IcingaZone.php b/library/Director/Objects/IcingaZone.php
index 5effa66b..345fdcf1 100644
--- a/library/Director/Objects/IcingaZone.php
+++ b/library/Director/Objects/IcingaZone.php
@@ -15,6 +15,6 @@ class IcingaZone extends IcingaObject
 
     protected function renderParent_zone_id()
     {
-        return $this->renderZoneProperty('parent_zone', $this->parent_zone_id);
+        return $this->renderZoneProperty($this->parent_zone_id, 'parent_zone');
     }
 }