diff --git a/drivers/serial/21285.c b/drivers/serial/21285.c
index f31c669..cb6d85d 100644
--- a/drivers/serial/21285.c
+++ b/drivers/serial/21285.c
@@ -14,8 +14,8 @@
 #include <linux/tty_flip.h>
 #include <linux/serial_core.h>
 #include <linux/serial.h>
+#include <linux/io.h>
 
-#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/mach-types.h>
 #include <asm/hardware/dec21285.h>