diff --git a/Classes/Security/FilePermissionsAspect.php b/Classes/Security/FilePermissionsAspect.php
index bae64a1a..dd4bae65 100644
--- a/Classes/Security/FilePermissionsAspect.php
+++ b/Classes/Security/FilePermissionsAspect.php
@@ -125,6 +125,10 @@ protected function getFileUids(Folder $folder)
         foreach ($folder->getFiles() as $file) {
             $files[] = $file->getUid();
         }
+        /** @var Folder $subfolder */
+        foreach ($folder->getSubfolders() as $subfolder) {
+            $files = array_merge($files, $this->getFileUids($subfolder));
+        }
         return $files;
     }