diff --git a/include/mm/regions.h b/include/mm/regions.h
index df860ff0..e1f47237 100644
--- a/include/mm/regions.h
+++ b/include/mm/regions.h
@@ -32,7 +32,7 @@
 #define EBDA_ADDR_ENTRY     0x40E
 
 #define BIOS_ACPI_ROM_START 0xE0000
-#define BIOS_ACPI_ROM_STOP  0xFFFFF
+#define BIOS_ACPI_ROM_STOP  0x100000
 
 #define BIOS_ROM_ADDR_START 0xF0000