diff --git a/src/soc/intel/baytrail/acpi/southcluster.asl b/src/soc/intel/baytrail/acpi/southcluster.asl
index 75f2486..ab27344 100644
--- a/src/soc/intel/baytrail/acpi/southcluster.asl
+++ b/src/soc/intel/baytrail/acpi/southcluster.asl
@@ -30,6 +30,8 @@
 	}
 }
 
+External (\TOLM, IntObj)
+
 Name(_HID,EISAID("PNP0A08"))	/* PCIe */
 Name(_CID,EISAID("PNP0A03"))	/* PCI */