diff --git a/src/northbridge/amd/agesa/family15tn/northbridge.c b/src/northbridge/amd/agesa/family15tn/northbridge.c
index 76fd747..7248eb7 100644
--- a/src/northbridge/amd/agesa/family15tn/northbridge.c
+++ b/src/northbridge/amd/agesa/family15tn/northbridge.c
@@ -29,14 +29,12 @@
 #include <cpu/cpu.h>
 #include <cbmem.h>
 #include <AGESA.h>
-
 #include <cpu/x86/lapic.h>
+#include <cpu/amd/msr.h>
 #include <cpu/amd/mtrr.h>
-
 #include <Porting.h>
 #include <Options.h>
 #include <Topology.h>
-
 #include <northbridge/amd/agesa/state_machine.h>
 #include <northbridge/amd/agesa/agesa_helper.h>
 
@@ -307,7 +305,7 @@
 	 * It is not honored by the coreboot resource allocator if it is in
 	 * the CPU_CLUSTER.
 	 */
-	mmconf_resource(dev, 0xc0010058);
+	mmconf_resource(dev, MMIO_CONF_BASE);
 }
 
 static void set_resource(struct device *dev, struct resource *resource, u32 nodeid)