diff --git a/arch/sh/boards/mach-x3proto/setup.c b/arch/sh/boards/mach-x3proto/setup.c
index a70d23b21788..a340492087fa 100644
--- a/arch/sh/boards/mach-x3proto/setup.c
+++ b/arch/sh/boards/mach-x3proto/setup.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/io.h>
 #include <linux/smc91x.h>
+#include <linux/irq.h>
 #include <asm/ilsel.h>
 
 static struct resource heartbeat_resources[] = {