diff --git a/arch/h8300/include/asm/io.h b/arch/h8300/include/asm/io.h
index 2e221c5..f86918a 100644
--- a/arch/h8300/include/asm/io.h
+++ b/arch/h8300/include/asm/io.h
@@ -3,6 +3,8 @@
 
 #ifdef __KERNEL__
 
+#include <linux/types.h>
+
 /* H8/300 internal I/O functions */
 
 #define __raw_readb __raw_readb