diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 14336fd5410203614ab2deb3aba01e8fbaf7f314..85569bd253b2c000c31d1f564fae7513985bca77 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1750,7 +1750,7 @@ static void cache_set_flush(struct closure *cl)
 	if (!IS_ERR_OR_NULL(c->gc_thread))
 		kthread_stop(c->gc_thread);
 
-	if (!IS_ERR(c->root))
+	if (!IS_ERR_OR_NULL(c->root))
 		list_add(&c->root->list, &c->btree_cache);
 
 	/*