diff --git a/sbin/mount_ntfs/mount_ntfs.8 b/sbin/mount_ntfs/mount_ntfs.8
index 15f49dffc2a0..059618fd3127 100644
--- a/sbin/mount_ntfs/mount_ntfs.8
+++ b/sbin/mount_ntfs/mount_ntfs.8
@@ -30,7 +30,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd January 3, 1999
+.Dd November 17, 2007
 .Dt MOUNT_NTFS 8
 .Os
 .Sh NAME
@@ -82,6 +82,9 @@ on which the file system is being mounted.
 .It Fl m Ar mask
 Specify the maximum file permissions for files
 in the file system.
+Only the nine low-order bits of
+.Ar mask
+are used.
 .It Fl C Ar charset
 Specify local
 .Ar charset
diff --git a/sys/fs/ntfs/ntfs_vfsops.c b/sys/fs/ntfs/ntfs_vfsops.c
index 38302360a2bb..2207a1f11ff9 100644
--- a/sys/fs/ntfs/ntfs_vfsops.c
+++ b/sys/fs/ntfs/ntfs_vfsops.c
@@ -41,6 +41,7 @@
 #include <sys/buf.h>
 #include <sys/fcntl.h>
 #include <sys/malloc.h>
+#include <sys/stat.h>
 #include <sys/systm.h>
 
 #include <geom/geom.h>
@@ -318,7 +319,7 @@ ntfs_mountfs(devvp, mp, td)
 	if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v))
 		ntmp->ntm_gid = v;
 	if (1 == vfs_scanopt(mp->mnt_optnew, "mode", "%d", &v))
-		ntmp->ntm_mode = v;
+		ntmp->ntm_mode = v & ACCESSPERMS;
 	vfs_flagopt(mp->mnt_optnew,
 	    "caseins", &ntmp->ntm_flag, NTFS_MFLAG_CASEINS);
 	vfs_flagopt(mp->mnt_optnew,