diff --git a/sys/fs/tmpfs/tmpfs_vfsops.c b/sys/fs/tmpfs/tmpfs_vfsops.c
index 74aeba15cb8e..8316c70a69dd 100644
--- a/sys/fs/tmpfs/tmpfs_vfsops.c
+++ b/sys/fs/tmpfs/tmpfs_vfsops.c
@@ -150,10 +150,8 @@ tmpfs_mount(struct mount *mp)
 		return (EINVAL);
 
 	if (mp->mnt_flag & MNT_UPDATE) {
-		/* XXX: There is no support yet to update file system
-		 * settings.  Should be added. */
-
-		return EOPNOTSUPP;
+		if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0))
+			return (0);
 	}
 
 	vn_lock(mp->mnt_vnodecovered, LK_SHARED | LK_RETRY);