diff --git a/arch/mn10300/kernel/internal.h b/arch/mn10300/kernel/internal.h
index a5ac755dd69f4acbc8c6d213c47c285b8af41098..2df440105a80f78e111f4f863261cbb7abab10ae 100644
--- a/arch/mn10300/kernel/internal.h
+++ b/arch/mn10300/kernel/internal.h
@@ -9,6 +9,8 @@
  * 2 of the Licence, or (at your option) any later version.
  */
 
+#include <linux/irqreturn.h>
+
 struct clocksource;
 struct clock_event_device;