diff --git a/nixos/modules/services/networking/btsync.nix b/nixos/modules/services/networking/btsync.nix
index 7ddc9e1045e..f1bf5a5e3f9 100644
--- a/nixos/modules/services/networking/btsync.nix
+++ b/nixos/modules/services/networking/btsync.nix
@@ -246,6 +246,7 @@ in
       home            = "/var/lib/btsync";
       createHome      = true;
       uid             = config.ids.uids.btsync;
+      group           = "btsync";
     };
 
     systemd.services.btsync = with pkgs; {