diff --git a/src/Controller/APIController.php b/src/Controller/APIController.php
index 01910394..7193ca5d 100644
--- a/src/Controller/APIController.php
+++ b/src/Controller/APIController.php
@@ -2361,10 +2361,11 @@ class APIController extends Controller implements LoggedController
         $schedule_date = $req->request->get('date_schedule');
         $slot_id = $req->request->get('slot_id');
         $advance_order = $req->request->get('flag_advance_order');
-        if ($advance_order)
-            $flag_advance_order = true;
-        else
+        // check for 'false' text
+        if ($advance_order === false || $advance_order === 0 || $advance_order === '0' || $advance_order == 'false')
             $flag_advance_order = false;
+        else 
+            $flag_advance_order = true;
         // $flag_advance_order = $advance_order ? true : false;
 
         $jo = new JobOrder();