diff --git a/Layout/default/Preordercampaign/Index.php b/Layout/default/Preordercampaign/Index.php
index b917d4dea..1e2e27718 100644
--- a/Layout/default/Preordercampaign/Index.php
+++ b/Layout/default/Preordercampaign/Index.php
@@ -229,14 +229,14 @@
                   <?php endif; ?>
                 </td>
                 <td class="text-right">
-                  <a class="btn btn-sm btn-outline-primary" href="<?=self::getUrl("Preorder", "add", ["preordercampaign_id" => $camp->id])?>"><i class="fas fa-plus" title="Vorbestellung hinzufügen"></i></a>
+                  <a class="btn btn-sm btn-outline-primary" href="<?=self::getUrl("Preorder", "Index") . '?filter%5Bpreordercampaign_id%5D%5B%5D=' . $camp->id?>"><i class="fas fa-plus" title="Vorbestellung hinzufügen"></i></a>
                 </td>
                 <td><?=$camp->network->name?></td>
                 <td><?=$camp->name?></td>
                 <td>
                     <div class="row">
                         <div class="col-1 text-right" style="font-size: 1.5em" title="Bestellungen anzeigen">
-                            <a href="<?=self::getUrl("Preorder", "Index", ["filter" => ["preordercampaign_id" => $camp->id]])?>"><i class="fas fa-list-alt"></i></a>
+                            <a href="<?=self::getUrl("Preorder", "Index") . '?filter%5Bpreordercampaign_id%5D%5B%5D=' . $camp->id?>"><i class="fas fa-list-alt"></i></a>
                         </div>
                         <div class="col">
                             <table class="table-sm table-borderless">