diff --git a/apple/macbook-air/6/default.nix b/apple/macbook-air/6/default.nix
index 9588b30..35fe832 100644
--- a/apple/macbook-air/6/default.nix
+++ b/apple/macbook-air/6/default.nix
@@ -6,6 +6,9 @@
   boot = {
     extraModulePackages = with config.boot.kernelPackages; [ mba6x_bl ];
     kernelModules = [ "mba6x_bl" ];
+
+    # Divides power consumption by two.
+    kernelParams = [ "acpi_osi=" ];
   };
 
   services.xserver.deviceSection = lib.mkDefault ''