diff --git a/modules/nix-tools/user.nix b/modules/nix-tools/user.nix
index 9bda13d..495fee4 100644
--- a/modules/nix-tools/user.nix
+++ b/modules/nix-tools/user.nix
@@ -22,9 +22,9 @@
         ++ lib.optional isAdmin "wheel"
         ++ lib.optional config.virtualisation.docker.enable "docker"
         ++ lib.optional (isAdmin && config.services.forgejo.enable) config.services.forgejo.group
-        ++ lib.optional (isAdmin && config.services.postgresql.enable) config.services.postgresql.group;
+        ++ lib.optional (isAdmin && config.services.postgresql.enable) "postgres";
       };
-      
+
       security.sudo-rs.enable = lib.mkIf isAdmin true;
 
       home-manager.useGlobalPkgs = true;