diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index a6dbcf4..afb3438 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -612,7 +612,7 @@
 	return 0;
 }
 
-acpi_native_uint acpi_gbl_permanent_mmap;
+u8 acpi_gbl_permanent_mmap;
 
 
 void __init acpi_early_init(void)