diff --git a/application/IvtCustomer/IvtCustomerController.php b/application/IvtCustomer/IvtCustomerController.php
index 27f505d1b..a41bc2cdd 100644
--- a/application/IvtCustomer/IvtCustomerController.php
+++ b/application/IvtCustomer/IvtCustomerController.php
@@ -49,7 +49,7 @@ class IvtCustomerController extends mfBaseController {
       $ivtc->firstname = "";
       $ivtc->surname = str_replace("\r\n", " ", str_replace("\n", " ", $contact->company));
     }
-    $ivtc->UID = $contact->uid; // XXX
+    $ivtc->UID = ($contact->uid) ? $contact->uid : ""; //cannot be NULL
     $ivtc->zip = $contact->zip;
     $ivtc->location = $contact->city;