diff --git a/typo3/sysext/recordlist/Classes/Browser/FolderBrowser.php b/typo3/sysext/recordlist/Classes/Browser/FolderBrowser.php
index 57445dd3955bdfa7a631a90495db768cd7944f4e..e8f066bf94d30643e6e1cba1669294004edc4bc4 100644
--- a/typo3/sysext/recordlist/Classes/Browser/FolderBrowser.php
+++ b/typo3/sysext/recordlist/Classes/Browser/FolderBrowser.php
@@ -69,7 +69,7 @@ class FolderBrowser extends AbstractElementBrowser implements ElementBrowserInte
             $data['expandFolder'] = $this->expandFolder;
             $store = true;
         } else {
-            $this->expandFolder = $data['expandFolder'];
+            $this->expandFolder = $data['expandFolder'] ?? null;
             $store = false;
         }
         return [$data, $store];