diff --git a/application/WorkorderBase/WorkorderBaseController.php b/application/WorkorderBase/WorkorderBaseController.php
index 8fac50f33..1c967ce2e 100644
--- a/application/WorkorderBase/WorkorderBaseController.php
+++ b/application/WorkorderBase/WorkorderBaseController.php
@@ -180,7 +180,7 @@ class WorkorderBaseController extends TTCrud
             $newPreorders = PreorderModel::searchActive($filters);
 
             foreach ($newPreorders as $preorder) {
-                $existingWorkorder = (array) WorkorderModel::getFirst(['preorderId' => $preorder->id]);
+                $existingWorkorder = (array) WorkorderModel::getFirst(['preorderId' => (int)$preorder->id]);
 
                 if ($existingWorkorder) {
                     if ($existingWorkorder['status'] === 'archived') {