diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c
index 1c32aff792cb..f34dc405b4ec 100644
--- a/sys/kern/vfs_mount.c
+++ b/sys/kern/vfs_mount.c
@@ -1417,9 +1417,10 @@ vfs_mountroot_try(char *mountfrom)
 		TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
 		mtx_unlock(&mountlist_mtx);
 
-		/* sanity check system clock against root filesystem timestamp */
+		/* sanity check system clock against root fs timestamp */
 		inittodr(mp->mnt_time);
 		vfs_unbusy(mp, curthread);
+		error = VFS_START(mp, 0, curthread);
 	}
 	return(error);
 }