diff --git a/lib/TokenManager.php b/lib/TokenManager.php
index 413bb301..846d7664 100644
--- a/lib/TokenManager.php
+++ b/lib/TokenManager.php
@@ -66,6 +66,7 @@ class TokenManager {
 	 */
 	public function getToken($fileId, $shareToken = null) {
 		list($fileId,, $version) = Helper::parseFileId($fileId);
+		$owneruid = null;
 		// if the user is not logged-in do use the sharers storage
 		if($shareToken !== null) {
 			/** @var File $file */