diff --git a/drivers/pci/msi-apic.c b/drivers/pci/msi-apic.c
index 0eb5fe9003a2..5ed798b319c7 100644
--- a/drivers/pci/msi-apic.c
+++ b/drivers/pci/msi-apic.c
@@ -4,6 +4,7 @@
 
 #include <linux/pci.h>
 #include <linux/irq.h>
+#include <asm/smp.h>
 
 #include "msi.h"