diff --git a/src/soc/intel/baytrail/acpi/southcluster.asl b/src/soc/intel/baytrail/acpi/southcluster.asl
index 3e4f8e2a15..31efcb9aeb 100644
--- a/src/soc/intel/baytrail/acpi/southcluster.asl
+++ b/src/soc/intel/baytrail/acpi/southcluster.asl
@@ -159,7 +159,7 @@ Method (_CRS, 0, Serialized)
 	{
 		Store (LPFW, LMIN)
 		Store (0x00100000, LLEN)
-		Subtract (Add (LMIN, LLEN), One, LMAX)
+		Subtract (LMIN + LLEN, One, LMAX)
 	}
 	Else
 	{
@@ -238,7 +238,7 @@ Device (IOSF)
 	Method (_CRS)
 	{
 		CreateDwordField (^RBUF, ^RBAR._BAS, RBAS)
-		Store (Add (CONFIG_ECAM_MMCONF_BASE_ADDRESS, 0xD0), RBAS)
+		Store (CONFIG_ECAM_MMCONF_BASE_ADDRESS + 0xD0, RBAS)
 		Return (^RBUF)
 	}
 }
diff --git a/src/soc/intel/braswell/acpi/southcluster.asl b/src/soc/intel/braswell/acpi/southcluster.asl
index 3b33a795a9..0a4dbd1e80 100644
--- a/src/soc/intel/braswell/acpi/southcluster.asl
+++ b/src/soc/intel/braswell/acpi/southcluster.asl
@@ -157,7 +157,7 @@ Method (_CRS, 0, Serialized)
 	If (LAnd (LPFW != Zero, LPEN == One))
 	{
 		Store (LPFW, LMIN)
-		Store (Add (LMIN, 0x001FFFFF), LMAX)
+		Store (LMIN + 0x001FFFFF, LMAX)
 		Store (0x00200000, LLEN)
 	}
 	Else
@@ -237,7 +237,7 @@ Device (IOSF)
 	Method (_CRS)
 	{
 		CreateDwordField (^RBUF, ^RBAR._BAS, RBAS)
-		Store (Add (CONFIG_ECAM_MMCONF_BASE_ADDRESS, 0xD0), RBAS)
+		Store (CONFIG_ECAM_MMCONF_BASE_ADDRESS + 0xD0, RBAS)
 		Return (^RBUF)
 	}
 }