diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index c2090c023102..38c2e325f325 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -33,6 +33,8 @@
 #include <linux/stddef.h>
 #include <linux/acpi.h>
 
+#include "internal.h"
+
 #define PREFIX "ACPI: "
 
 #define ACPI_DOCK_DRIVER_DESCRIPTION "ACPI Dock Station Driver"