diff --git a/core/Controller/ClientFlowLoginController.php b/core/Controller/ClientFlowLoginController.php
index 3bd396a0b9..3050248f4e 100644
--- a/core/Controller/ClientFlowLoginController.php
+++ b/core/Controller/ClientFlowLoginController.php
@@ -207,6 +207,7 @@ class ClientFlowLoginController extends Controller {
 	/**
 	 * @NoAdminRequired
 	 * @NoCSRFRequired
+	 * @NoSameSiteCookieRequired
 	 * @UseSession
 	 *
 	 * @param string $stateToken