diff --git a/arch/sh/include/cpu-sh3/cpu/dac.h b/arch/sh/include/cpu-sh3/cpu/dac.h
index fd02331608a8..323ec8570bcd 100644
--- a/arch/sh/include/cpu-sh3/cpu/dac.h
+++ b/arch/sh/include/cpu-sh3/cpu/dac.h
@@ -2,6 +2,8 @@
 #ifndef __ASM_CPU_SH3_DAC_H
 #define __ASM_CPU_SH3_DAC_H
 
+#include <linux/io.h>
+
 /*
  * Copyright (C) 2003  Andriy Skulysh
  */