diff --git a/drivers/acpi/acpica/acpredef.h b/drivers/acpi/acpica/acpredef.h
index 1b7ad31d8355..c777f0223f4e 100644
--- a/drivers/acpi/acpica/acpredef.h
+++ b/drivers/acpi/acpica/acpredef.h
@@ -635,6 +635,10 @@ const union acpi_predefined_info acpi_gbl_predefined_methods[] = {
 	PACKAGE_INFO(ACPI_PTYPE1_FIXED, ACPI_RTYPE_INTEGER, 1,
 		     ACPI_RTYPE_BUFFER, 1, 0),
 
+	{{"_LSW",
+	  METHOD_3ARGS(ACPI_TYPE_INTEGER, ACPI_TYPE_INTEGER, ACPI_TYPE_BUFFER),
+	  METHOD_RETURNS(ACPI_RTYPE_INTEGER)}},
+
 	{{"_MAT", METHOD_0ARGS,
 	  METHOD_RETURNS(ACPI_RTYPE_BUFFER)}},