diff --git a/sys/ufs/ufs/ufs_readwrite.c b/sys/ufs/ufs/ufs_readwrite.c
index 9d407bb07b0d..7fc80b3aa638 100644
--- a/sys/ufs/ufs/ufs_readwrite.c
+++ b/sys/ufs/ufs/ufs_readwrite.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: ufs_readwrite.c,v 1.35 2001/09/30 02:50:35 chs Exp $	*/
+/*	$NetBSD: ufs_readwrite.c,v 1.36 2001/10/03 05:02:46 chs Exp $	*/
 
 /*-
  * Copyright (c) 1993
@@ -205,6 +205,7 @@ WRITE(void *v)
 	int ubc_alloc_flags;
 	void *win;
 	vsize_t bytelen;
+	boolean_t async;
 	boolean_t usepc = FALSE;
 
 	cred = ap->a_cred;
@@ -260,6 +261,7 @@ WRITE(void *v)
 		return (EFBIG);
 	}
 
+	async = vp->v_mount->mnt_flag & MNT_ASYNC;
 	resid = uio->uio_resid;
 	osize = ip->i_ffs_size;
 	bsize = fs->fs_bsize;
@@ -352,7 +354,7 @@ WRITE(void *v)
 		 * XXXUBC simplistic async flushing.
 		 */
 
-		if (oldoff >> 16 != uio->uio_offset >> 16) {
+		if (!async && oldoff >> 16 != uio->uio_offset >> 16) {
 			simple_lock(&vp->v_uobj.vmobjlock);
 			error = (vp->v_uobj.pgops->pgo_put)(&vp->v_uobj,
 			    (oldoff >> 16) << 16, (uio->uio_offset >> 16) << 16,