diff --git a/src/northbridge/intel/nehalem/Kconfig b/src/northbridge/intel/nehalem/Kconfig
index 4dada50..884660a 100644
--- a/src/northbridge/intel/nehalem/Kconfig
+++ b/src/northbridge/intel/nehalem/Kconfig
@@ -24,6 +24,10 @@
 
 if NORTHBRIDGE_INTEL_NEHALEM
 
+config MMCONF_BUS_NUMBER
+	int
+	default 256
+
 config CBFS_SIZE
 	hex
 	default 0x100000