diff --git a/drivers/md/md.c b/drivers/md/md.c
index be2014f..39c9c87 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -44,6 +44,7 @@
 #include <linux/random.h>
 #include <linux/reboot.h>
 #include <linux/file.h>
+#include <linux/delay.h>
 
 #define MAJOR_NR MD_MAJOR