diff --git a/block/genhd.c b/block/genhd.c
index 3c9dede..0ad8796 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -856,6 +856,7 @@
 	if (iter) {
 		class_dev_iter_exit(iter);
 		kfree(iter);
+		seqf->private = NULL;
 	}
 }