diff --git a/drivers/acpi/proc.c b/drivers/acpi/proc.c
index db061bfd95a8de20aea42e95ae0bda75c6b68a9f..50fe34ffe932fbdc9b1e9166c551fb025754853e 100644
--- a/drivers/acpi/proc.c
+++ b/drivers/acpi/proc.c
@@ -7,6 +7,7 @@
 #include <asm/uaccess.h>
 
 #include "sleep.h"
+#include "internal.h"
 
 #define _COMPONENT		ACPI_SYSTEM_COMPONENT