diff --git a/drivers/acpi/bgrt.c b/drivers/acpi/bgrt.c
index 8cf6c46e99fb538b320b7e63131269ef78accaae..6680df36b9634f414cc7438ca57590bef0c8cc71 100644
--- a/drivers/acpi/bgrt.c
+++ b/drivers/acpi/bgrt.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/sysfs.h>
+#include <linux/io.h>
 #include <acpi/acpi.h>
 #include <acpi/acpi_bus.h>