diff --git a/sys/dev/vn/vn.c b/sys/dev/vn/vn.c
index f51efca8ed75..199c8046d460 100644
--- a/sys/dev/vn/vn.c
+++ b/sys/dev/vn/vn.c
@@ -510,10 +510,7 @@ vniocattach_file(vn, vio, dev, flag, p)
 		(void) vn_close(nd.ni_vp, flags, p->p_ucred, p);
 		return(error);
 	}
-	if (dev->si_bsize_phys < vn->sc_secsize)
-		dev->si_bsize_phys = vn->sc_secsize;
-	if (dev->si_bsize_best < vn->sc_secsize)
-		dev->si_bsize_best = vn->sc_secsize;
+	dev->si_bsize_phys = vn->sc_secsize;
 	vn->sc_flags |= VNF_INITED;
 	if (flags == FREAD)
 		vn->sc_flags |= VNF_READONLY;