diff --git a/apps/files_external/lib/Controller/UserStoragesController.php b/apps/files_external/lib/Controller/UserStoragesController.php
index b788264d9607d..a3d582e35007b 100644
--- a/apps/files_external/lib/Controller/UserStoragesController.php
+++ b/apps/files_external/lib/Controller/UserStoragesController.php
@@ -233,7 +233,7 @@ public function update(
 	 */
 	#[NoAdminRequired]
 	#[PasswordConfirmationRequired]
-	public function destroy($id) {
+	public function destroy(int $id) {
 		return parent::destroy($id);
 	}
 }