diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index 472be1c..f5e0ea7 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -9,6 +9,7 @@
 #include <asm/cpu.h>
 #include <linux/intel-iommu.h>
 #include "intr_remapping.h"
+#include <acpi/acpi.h>
 
 static struct ioapic_scope ir_ioapic[MAX_IO_APICS];
 static int ir_ioapic_num;