diff --git a/application/TimerecordingCar/TimerecordingCarController.php b/application/TimerecordingCar/TimerecordingCarController.php
index f718bac62..84277f341 100644
--- a/application/TimerecordingCar/TimerecordingCarController.php
+++ b/application/TimerecordingCar/TimerecordingCarController.php
@@ -91,7 +91,7 @@ class TimerecordingCarController extends mfBaseController
         $data['first_approval'] = trim($r->first_approval);
 
 
-        if (!$data['user_id']) {
+        if (!$data['user_id'] || $data['user_id'] == "-") {
             $data['user_id'] = null;
         }
         if (!$data['initial_approval']) {