diff --git a/src/soc/intel/baytrail/acpi/southcluster.asl b/src/soc/intel/baytrail/acpi/southcluster.asl
index 03f884a..53f181e 100644
--- a/src/soc/intel/baytrail/acpi/southcluster.asl
+++ b/src/soc/intel/baytrail/acpi/southcluster.asl
@@ -155,11 +155,11 @@
 	CreateDWordField (MCRS, ^LMEM._MIN, LMIN)
 	CreateDWordField (MCRS, ^LMEM._MAX, LMAX)
 	CreateDWordField (MCRS, ^LMEM._LEN, LLEN)
-	If (LPFW != Zero && LPEN == One)
+	If (LPFW != Zero && LPEN == 1)
 	{
 		LMIN = LPFW
 		LLEN = 0x00100000
-		LMAX = LMIN + LLEN - One
+		LMAX = LMIN + LLEN - 1
 	}
 	Else
 	{