diff --git a/nixos/configuration.nix b/nixos/configuration.nix
index 9dfb994..5a643fc 100644
--- a/nixos/configuration.nix
+++ b/nixos/configuration.nix
@@ -48,7 +48,7 @@
 
   # Enable the X11 windowing system.
   services.xserver.enable = true;
-  services.xserver.desktopManager.default = "bspwm";
+  services.xserver.displayManager.defaultSession = "bspwm";
   services.xserver.desktopManager.session =
     [ {
         manage = "desktop";