diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 886be9cc0016e643525683e0aa5b91691f931dbe..41cd3597e4829fcd67c892589a118da25689eded 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -254,7 +254,7 @@ struct dentry *nfs4_try_mount(int flags, const char *dev_name,
 	res = nfs_follow_remote_path(root_mnt, export_path);
 
 	if (!IS_ERR(res))
-		res->d_sb->s_flags = flags;
+		res->d_sb->s_flags |= (flags & SB_RDONLY);
 	dfprintk(MOUNT, "<-- nfs4_try_mount() = %d%s\n",
 		 PTR_ERR_OR_ZERO(res),
 		 IS_ERR(res) ? " [error]" : "");