diff --git a/lib/Controller/LockController.php b/lib/Controller/LockController.php
index 7eb7970f..8701bbc5 100644
--- a/lib/Controller/LockController.php
+++ b/lib/Controller/LockController.php
@@ -130,7 +130,7 @@ public function unlocking(string $fileId): DataResponse {
 			$lock = $this->lockService->getLockFromFileId((int)$fileId);
 			$response = new DataResponse();
 			$response->setStatus(Http::STATUS_LOCKED);
-			$response->setData($lock->jsonSerialize());
+			$response->setData($lock);
 			return $response;
 		} catch (Exception $e) {
 			return $this->fail($e);