diff --git a/src/southbridge/intel/bd82x6x/smbus.c b/src/southbridge/intel/bd82x6x/smbus.c
index 7a00cf4..b251596 100644
--- a/src/southbridge/intel/bd82x6x/smbus.c
+++ b/src/southbridge/intel/bd82x6x/smbus.c
@@ -4,6 +4,7 @@
 #include <device/path.h>
 #include <device/smbus.h>
 #include <device/pci.h>
+#include <device/pci_def.h>
 #include <device/pci_ids.h>
 #include <device/pci_ops.h>
 #include <device/smbus_host.h>
@@ -34,7 +35,7 @@
 
 	device = dev->path.i2c.device;
 	pbus = get_pbus_smbus(dev);
-	res = find_resource(pbus->dev, 0x20);
+	res = find_resource(pbus->dev, PCI_BASE_ADDRESS_4);
 
 	return do_smbus_read_byte(res->base, device, address);
 }
@@ -47,7 +48,7 @@
 
 	device = dev->path.i2c.device;
 	pbus = get_pbus_smbus(dev);
-	res = find_resource(pbus->dev, 0x20);
+	res = find_resource(pbus->dev, PCI_BASE_ADDRESS_4);
 
 	return do_smbus_write_byte(res->base, device, address, val);
 }