diff --git a/share/man/man9/VFS_UNMOUNT.9 b/share/man/man9/VFS_UNMOUNT.9
index ee5f9b7ae157..1face4913e1b 100644
--- a/share/man/man9/VFS_UNMOUNT.9
+++ b/share/man/man9/VFS_UNMOUNT.9
@@ -28,7 +28,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 24, 1996
+.Dd January 7, 2005
 .Os
 .Dt VFS_UNMOUNT 9
 .Sh NAME
@@ -41,21 +41,26 @@
 .Ft int
 .Fn VFS_UNMOUNT "struct mount *mp" "int mntflags" "struct thread *td"
 .Sh DESCRIPTION
-Unmount a file system.
+The
+.Fn VFS_UNMOUNT
+macro unmounts a file system.
 .Pp
-Its arguments are:
+The arguments it expects are:
 .Bl -tag -width mntflags
 .It Fa mp
 The file system.
 .It Fa mntflags
-Various flags.
+Bit-mask of flags for the unmount operation.
+The flags currently supported by
+.Fn VFS_UNMOUNT
+are:
+.Bl -tag -width ".Dv MNT_FORCE"
+.It Dv MNT_FORCE
+Open files are forcibly closed before the file system is unmounted.
+.El
 .It Fa td
 Thread which is unmounting the file system.
 .El
-.Pp
-If the
-.Dv MNT_FORCE
-flag is specified then open files should be forcibly closed.
 .Sh SEE ALSO
 .Xr vflush 9 ,
 .Xr VFS 9 ,