diff --git a/nixos/modules/misc/ids.nix b/nixos/modules/misc/ids.nix
index a434932497d9..108ab5d4f318 100644
--- a/nixos/modules/misc/ids.nix
+++ b/nixos/modules/misc/ids.nix
@@ -392,7 +392,7 @@ in
       tape = 25;
       video = 26;
       dialout = 27;
-      #polkituser = 28; # currently unused, polkitd doesn't need a group
+      polkituser = 28;
       utmp = 29;
       # ddclient = 30; # converted to DynamicUser = true
       davfs2 = 31;
diff --git a/nixos/modules/security/polkit.nix b/nixos/modules/security/polkit.nix
index de427ccb295b..903bbbcab072 100644
--- a/nixos/modules/security/polkit.nix
+++ b/nixos/modules/security/polkit.nix
@@ -113,7 +113,7 @@ in
       group = "polkituser";
     };
 
-    users.groups.polkituser = {};
+    users.groups.polkituser.gid = config.ids.gids.polkituser;
   };
 
 }