diff --git a/sys/sys/mount.h b/sys/sys/mount.h
index 70e50979af3a..16ea687672ca 100644
--- a/sys/sys/mount.h
+++ b/sys/sys/mount.h
@@ -305,6 +305,7 @@ void          __mnt_vnode_markerfree(struct vnode **mvp, struct mount *mp);
  */
 #define MNTK_UNMOUNTF	0x00000001	/* forced unmount in progress */
 #define MNTK_ASYNC	0x00000002	/* filtered async flag */
+#define MNTK_SOFTDEP	0x00000004	/* async disabled by softdep */
 #define MNTK_UNMOUNT	0x01000000	/* unmount in progress */
 #define	MNTK_MWAIT	0x02000000	/* waiting for unmount to finish */
 #define	MNTK_SUSPEND	0x08000000	/* request write suspension */
diff --git a/sys/ufs/ffs/ffs_softdep.c b/sys/ufs/ffs/ffs_softdep.c
index 680556326d9a..b1a11bee1d7c 100644
--- a/sys/ufs/ffs/ffs_softdep.c
+++ b/sys/ufs/ffs/ffs_softdep.c
@@ -1426,6 +1426,11 @@ softdep_mount(devvp, mp, fs, cred)
 	MNT_ILOCK(mp);
 	mp->mnt_flag &= ~MNT_ASYNC;
 	mp->mnt_flag |= MNT_SOFTDEP;
+	if ((mp->mnt_kern_flag & MNTK_SOFTDEP) == 0) {
+		mp->mnt_kern_flag = (mp->mnt_kern_flag & ~MNTK_ASYNC) | 
+			MNTK_SOFTDEP;
+		mp->mnt_noasync++;
+	}
 	MNT_IUNLOCK(mp);
 	ump = VFSTOUFS(mp);
 	LIST_INIT(&ump->softdep_workitem_pending);