diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c
index 458331d3fcb7..04f4b7dce332 100644
--- a/drivers/staging/comedi/drivers/ni_mio_common.c
+++ b/drivers/staging/comedi/drivers/ni_mio_common.c
@@ -58,6 +58,7 @@
 
 #include <linux/interrupt.h>
 #include <linux/sched.h>
+#include <linux/delay.h>
 #include "8255.h"
 #include "mite.h"
 #include "comedi_fc.h"