diff --git a/nixos/desktop/default.nix b/nixos/desktop/default.nix
index 8284ad6..99c907c 100644
--- a/nixos/desktop/default.nix
+++ b/nixos/desktop/default.nix
@@ -172,7 +172,7 @@
     #   enable = true;
     #   wayland.enable = true;
     # };
-    displayManager.defaultSession = "plasma";
+    displayManager.defaultSession = lib.mkDefault "plasma";
     desktopManager.plasma6.enable = true;
     desktopManager.plasma6.notoPackage = pkgs.atkinson-hyperlegible;