diff --git a/include/acpi/acglobal.h b/include/acpi/acglobal.h
index 77d73a4..90cc820 100644
--- a/include/acpi/acglobal.h
+++ b/include/acpi/acglobal.h
@@ -141,7 +141,6 @@
 ACPI_EXTERN struct acpi_internal_rsdt acpi_gbl_root_table_list;
 ACPI_EXTERN struct acpi_table_fadt acpi_gbl_FADT;
 ACPI_EXTERN struct acpi_table_facs *acpi_gbl_FACS;
-extern u8 acpi_gbl_permanent_mmap;
 
 /* These addresses are calculated from FADT address values */
 
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index c9b903f..be0aa5e 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -48,6 +48,8 @@
 #include "actypes.h"
 #include "actbl.h"
 
+extern u8 acpi_gbl_permanent_mmap;
+
 /*
  * Global interfaces
  */