diff --git a/application/Network/NetworkController.php b/application/Network/NetworkController.php
index b50cc00b6..93334f73b 100644
--- a/application/Network/NetworkController.php
+++ b/application/Network/NetworkController.php
@@ -75,7 +75,7 @@ class NetworkController extends mfBaseController {
     $data['owner_id'] = $r->owner_id;
     $data['name'] = $r->name;
     $data['note'] = $r->note;
-    $data['adb_netzgebiet_id'] = $r->adb_netzgebiet_id;
+    $data['adb_netzgebiet_id'] = ($r->adb_netzgebiet_id) ? $r->adb_netzgebiet_id : null;
     
     if($r->sytemowner_action_status) {
       $data['sytemowner_action_status'] = $r->sytemowner_action_status;