diff --git a/Classes/Controller/CollectionController.php b/Classes/Controller/CollectionController.php
index 890e75f5c0..761093c5da 100644
--- a/Classes/Controller/CollectionController.php
+++ b/Classes/Controller/CollectionController.php
@@ -135,7 +135,7 @@ public function showAction(Collection $collection): void
             $currentPage = 1;
         }
 
-        $searchParams['collection'] = $collection;
+        $searchParams['collection'] = $collection->getUid();
         // If a targetPid is given, the results will be shown by ListView on the target page.
         if (!empty($this->settings['targetPid'])) {
             $this->redirect('main', 'ListView', null,