diff --git a/drivers/char/pcmcia/scr24x_cs.c b/drivers/char/pcmcia/scr24x_cs.c
index 4f215ce1a3be..a1de354a89a7 100644
--- a/drivers/char/pcmcia/scr24x_cs.c
+++ b/drivers/char/pcmcia/scr24x_cs.c
@@ -27,6 +27,7 @@
 #include <linux/cdev.h>
 #include <linux/slab.h>
 #include <linux/fs.h>
+#include <linux/io.h>
 #include <linux/uaccess.h>
 
 #include <pcmcia/cistpl.h>