diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index 6d2b478..7ac035a 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -1235,6 +1235,7 @@
 		goto error;
 
 	rcu_assign_pointer(conf->log, log);
+	set_bit(MD_HAS_JOURNAL, &conf->mddev->flags);
 	return 0;
 
 error: