diff --git a/application/Preorder/PreorderController.php b/application/Preorder/PreorderController.php
index 00c3b68c8..933ed45c9 100644
--- a/application/Preorder/PreorderController.php
+++ b/application/Preorder/PreorderController.php
@@ -20,7 +20,7 @@ class PreorderController extends mfBaseController {
     if($this->request->resetFilter) {
       unset($_SESSION[MFAPPNAME.'-Preorder-filter']);
       foreach($_SESSION as $key => $s) {
-        if(preg_match('/^'.MFAPPNAME.'-Preorder-filter-campaign-\d+$', $key)) {
+        if(preg_match('/^'.MFAPPNAME.'-Preorder-filter-campaign-\d+$/', $key)) {
           unset($_SESSION[$key]);
         }
       }