diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c
index 6b1919f..68bb305 100644
--- a/drivers/acpi/debugfs.c
+++ b/drivers/acpi/debugfs.c
@@ -7,6 +7,8 @@
 #include <linux/debugfs.h>
 #include <linux/acpi.h>
 
+#include "internal.h"
+
 #define _COMPONENT		ACPI_SYSTEM_COMPONENT
 ACPI_MODULE_NAME("debugfs");