--- null_subr.c	Tue Apr 29 17:18:30 2003
+++ null_subr.c.new	Tue Apr 29 17:11:37 2003
@@ -73,6 +73,7 @@ MALLOC_DEFINE(M_NULLFSNODE, "NULLFS node
 
 static struct vnode * null_hashget(struct vnode *);
 static struct vnode * null_hashins(struct null_node *);
+extern void	addalias(struct vnode *vp, dev_t nvp_rdev);
 
 /*
  * Initialise cache headers
@@ -224,6 +225,10 @@ null_nodeget(mp, lowervp, vpp)
 	xp->null_lowervp = lowervp;
 
 	vp->v_type = lowervp->v_type;
+	if (vp->v_type == VCHR || vp->v_type == VBLK)
+		addalias(vp, lowervp->v_un.vu_spec.vu_cdev);
+	else
+		vp->v_un = lowervp->v_un;
 	vp->v_data = xp;
 
 	/*