diff --git a/src/include/acpi/acpi.h b/src/include/acpi/acpi.h
index 1704393..69bc00e 100644
--- a/src/include/acpi/acpi.h
+++ b/src/include/acpi/acpi.h
@@ -68,6 +68,8 @@
 /* List of ACPI HID that use the coreboot ACPI ID */
 enum coreboot_acpi_ids {
 	COREBOOT_ACPI_ID_CBTABLE	= 0x0000, /* BOOT0000 */
+	COREBOOT_ACPI_ID_IGD_GMBUS_ARB  = 0x0001, /* BOOT0001 */
+	COREBOOT_ACPI_ID_IGD_GMBUS_LINK = 0x0002, /* BOOT0002 */
 	COREBOOT_ACPI_ID_MAX		= 0xFFFF, /* BOOTFFFF */
 };