diff --git a/drivers/acpi/motherboard.c b/drivers/acpi/motherboard.c
index 61ea70742d4912863df0fe4a25f01c1a98d54829..2934475d67d605a540ee4a58d3ef11ccda10c3c8 100644
--- a/drivers/acpi/motherboard.c
+++ b/drivers/acpi/motherboard.c
@@ -43,7 +43,7 @@ ACPI_MODULE_NAME		("acpi_motherboard")
  */
 #define IS_RESERVED_ADDR(base, len) \
 	(((len) > 0) && ((base) > 0) && ((base) + (len) < IO_SPACE_LIMIT) \
-	&& ((base) + (len) > PCIBIOS_MIN_IO))
+	&& ((base) + (len) > 0x1000))
 
 /*
  * Clearing the flag (IORESOURCE_BUSY) allows drivers to use