diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 5342300719ee..79eb35d080a0 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -307,6 +307,7 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_no_resource_disassembly, FALSE);
 ACPI_INIT_GLOBAL(u8, acpi_gbl_ignore_noop_operator, FALSE);
 ACPI_INIT_GLOBAL(u8, acpi_gbl_cstyle_disassembly, TRUE);
 ACPI_INIT_GLOBAL(u8, acpi_gbl_force_aml_disassembly, FALSE);
+ACPI_INIT_GLOBAL(union acpi_parse_object *, acpi_gbl_previous_op, NULL);
 
 ACPI_GLOBAL(u8, acpi_gbl_db_opt_disasm);
 ACPI_GLOBAL(u8, acpi_gbl_db_opt_verbose);