diff --git a/lass/2configs/backup.nix b/lass/2configs/backup.nix
index 94272fdb0..f5c241785 100644
--- a/lass/2configs/backup.nix
+++ b/lass/2configs/backup.nix
@@ -6,6 +6,7 @@ with import <stockholm/lib>;
     useDefaultShell = true;
     home = "/backups";
     createHome = true;
+    group = "syncthing";
     openssh.authorizedKeys.keys = with config.krebs.hosts; [
       blue.ssh.pubkey
     ];