diff --git a/lib/Files/Util.php b/lib/Files/Util.php
index 2dfc15eb57..e5b9c61d11 100644
--- a/lib/Files/Util.php
+++ b/lib/Files/Util.php
@@ -67,7 +67,7 @@ class Util {
 			if (!$node->getStorage()->instanceOfStorage(SharedStorage::class)) {
 				// The file is not a shared file,
 				// let's check the accesslist for mount points of groupfolders and external storages
-				$mountsForFile = $this->userMountCache->getMountsForFileId((int) $fileId);
+				$mountsForFile = $this->userMountCache->getMountsForFileId($fileId);
 				$affectedUserIds = array_map(function (ICachedMountInfo $mount) {
 					return $mount->getUser()->getUID();
 				}, $mountsForFile);
diff --git a/tests/psalm-baseline.xml b/tests/psalm-baseline.xml
index 7aea94863f..abdde0391d 100644
--- a/tests/psalm-baseline.xml
+++ b/tests/psalm-baseline.xml
@@ -181,7 +181,8 @@
     </UndefinedClass>
   </file>
   <file src="lib/Files/Util.php">
-    <InvalidArgument occurrences="1">
+    <InvalidArgument occurrences="2">
+      <code>$fileId</code>
       <code>SharedStorage::class</code>
     </InvalidArgument>
   </file>