diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index d4757c98ec1400f9a2328e8e17c1c8e2a8a8c836..d47c5ec7fb1ff0500ebbeb7f403debfa865c87a0 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -779,6 +779,10 @@ static int ceph_register_bdi(struct super_block *sb,
 		fsc->backing_dev_info.ra_pages =
 			(fsc->mount_options->rsize + PAGE_CACHE_SIZE - 1)
 			>> PAGE_SHIFT;
+	else
+		fsc->backing_dev_info.ra_pages =
+			default_backing_dev_info.ra_pages;
+
 	err = bdi_register(&fsc->backing_dev_info, NULL, "ceph-%d",
 			   atomic_long_inc_return(&bdi_seq));
 	if (!err)