diff --git a/src/mainboard/intel/cougar_canyon2/dsdt.asl b/src/mainboard/intel/cougar_canyon2/dsdt.asl
index 82d6ee5076..6e793c4690 100644
--- a/src/mainboard/intel/cougar_canyon2/dsdt.asl
+++ b/src/mainboard/intel/cougar_canyon2/dsdt.asl
@@ -45,6 +45,7 @@ DefinitionBlock(
 		{
 			#include <northbridge/intel/fsp_sandybridge/acpi/sandybridge.asl>
 			#include <southbridge/intel/fsp_bd82x6x/acpi/pch.asl>
+			#include <drivers/intel/gma/acpi/default_brightness_levels.asl>
 		}
 	}