diff --git a/nixos/modules/services/x11/display-managers/lightdm.nix b/nixos/modules/services/x11/display-managers/lightdm.nix
index e6851669723..b2664b5a5a7 100644
--- a/nixos/modules/services/x11/display-managers/lightdm.nix
+++ b/nixos/modules/services/x11/display-managers/lightdm.nix
@@ -50,13 +50,11 @@ let
     '';
   };
 
-  hiddenUsers = config.services.xserver.displayManager.hiddenUsers;
-
   usersConf = writeText "users.conf"
     ''
       [UserList]
       minimum-uid=500
-      hidden-users=${concatStringsSep " " hiddenUsers}
+      hidden-users=${concatStringsSep " " dmcfg.hiddenUsers}
       hidden-shells=/run/current-system/sw/sbin/nologin
     '';