diff --git a/doc/BUILDING.mdoc b/doc/BUILDING.mdoc
index 7d0af4404f5f..22cc9e9ea10e 100644
--- a/doc/BUILDING.mdoc
+++ b/doc/BUILDING.mdoc
@@ -1,4 +1,4 @@
-.\"	$NetBSD: BUILDING.mdoc,v 1.64 2008/08/28 07:21:49 lukem Exp $
+.\"	$NetBSD: BUILDING.mdoc,v 1.65 2008/09/06 23:22:46 lukem Exp $
 .\"
 .\" Copyright (c) 2001-2008 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -391,6 +391,12 @@ Indicates whether system documentation destined for
 will be installed during a build.
 .DFLTy
 .
+.It Sy MKHTML
+.YorN
+Indicates whether preformatted HTML manual pages will be built
+and installed
+.DFLTy
+.
 .It Sy MKHOSTOBJ
 .YorN
 If set to