diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
index 1f476e477844df02d09f21ec23ddb8f5084c4cba..48471199887d34f25bdda72a313b21e9ce52f464 100644
--- a/arch/x86/mm/k8topology_64.c
+++ b/arch/x86/mm/k8topology_64.c
@@ -22,6 +22,7 @@
 #include <asm/numa.h>
 #include <asm/mpspec.h>
 #include <asm/apic.h>
+#include <asm/k8.h>
 
 static __init int find_northbridge(void)
 {