diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index b3f4b30222fa328a8005f6d9de1fa57055da11aa..117f5b8daf7515bf8ac03deb5522a011c286280d 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -10,6 +10,7 @@
 #include <linux/acpi.h>
 
 #include <linux/io.h>
+#include <asm/io_apic.h>
 #include <asm/pci_x86.h>
 
 #include <asm/xen/hypervisor.h>