diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 84cdb70..fa72f01 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -752,6 +752,8 @@
 static void multipath_dtr(struct dm_target *ti)
 {
 	struct multipath *m = (struct multipath *) ti->private;
+
+	flush_workqueue(kmultipathd);
 	free_multipath(m);
 }