diff --git a/drivers/tty/serial/dz.c b/drivers/tty/serial/dz.c
index 6d91e9b6284d..e9edabc5a211 100644
--- a/drivers/tty/serial/dz.c
+++ b/drivers/tty/serial/dz.c
@@ -47,8 +47,8 @@
 #include <linux/tty_flip.h>
 
 #include <linux/atomic.h>
+#include <linux/io.h>
 #include <asm/bootinfo.h>
-#include <asm/io.h>
 
 #include <asm/dec/interrupts.h>
 #include <asm/dec/kn01.h>