diff --git a/modules/services/x11/display-managers/kdm.nix b/modules/services/x11/display-managers/kdm.nix
index 1699f6c65a7..08ae667211d 100644
--- a/modules/services/x11/display-managers/kdm.nix
+++ b/modules/services/x11/display-managers/kdm.nix
@@ -12,8 +12,8 @@ let
   defaultConfig =
     ''
       [Shutdown]
-      HaltCmd=${config.system.build.systemd}/sbin/halt
-      RebootCmd=${config.system.build.systemd}/sbin/reboot
+      HaltCmd=${config.system.build.systemd}/sbin/shutdown -h now
+      RebootCmd=${config.system.build.systemd}/sbin/shutdown -r now
       ${optionalString (config.system.boot.loader.id == "grub") ''
         BootManager=${if config.boot.loader.grub.version == 2 then "Grub2" else "Grub"}
       ''}