diff --git a/arch/sh/boards/renesas/r7780rp/irq-r7780rp.c b/arch/sh/boards/renesas/r7780rp/irq-r7780rp.c
index d6b107a2e0b5..fa4a534cade9 100644
--- a/arch/sh/boards/renesas/r7780rp/irq-r7780rp.c
+++ b/arch/sh/boards/renesas/r7780rp/irq-r7780rp.c
@@ -9,6 +9,7 @@
  * for more details.
  */
 #include <linux/init.h>
+#include <linux/io.h>
 #include <asm/r7780rp.h>
 
 unsigned char * __init highlander_init_irq_r7780rp(void)