diff --git a/lib/ACL/ACLStorageWrapper.php b/lib/ACL/ACLStorageWrapper.php
index d3096b2c7..82b4fdebb 100644
--- a/lib/ACL/ACLStorageWrapper.php
+++ b/lib/ACL/ACLStorageWrapper.php
@@ -164,7 +164,7 @@ public function is_file($path): bool {
 			parent::is_file($path);
 	}
 
-	public function stat($path) {
+	public function stat(string $path): array|false {
 		if (!$this->checkPermissions(Constants::PERMISSION_READ)) {
 			return false;
 		}