diff --git a/machines/T420-Laptop/default.nix b/machines/T420-Laptop/default.nix
index dc85d54..0d37b7e 100644
--- a/machines/T420-Laptop/default.nix
+++ b/machines/T420-Laptop/default.nix
@@ -12,6 +12,8 @@
     vsftpd
   ];
 
+  services.logind.lidSwitch = "ignore";
+
   security.sudo.wheelNeedsPassword = false;
 
   deviceSpecific.devInfo = {