diff --git a/src/ec/google/chromeec/acpi/superio.asl b/src/ec/google/chromeec/acpi/superio.asl
index 04b112f7f7..0f06e30cb3 100644
--- a/src/ec/google/chromeec/acpi/superio.asl
+++ b/src/ec/google/chromeec/acpi/superio.asl
@@ -82,7 +82,7 @@ Device (SIO) {
 			    EC_HOST_CMD_REGION0, EC_HOST_CMD_REGION0, 0x08,
 			    EC_HOST_CMD_REGION_SIZE)
 			IO (Decode16,
-			    EC_HOST_CMD_REGION1, EC_HOST_CMD_REGION0, 0x08,
+			    EC_HOST_CMD_REGION1, EC_HOST_CMD_REGION1, 0x08,
 			    EC_HOST_CMD_REGION_SIZE)
 		})