diff --git a/BUILDING b/BUILDING
index c5d13451a76f..28986b27ce6a 100644
--- a/BUILDING
+++ b/BUILDING
@@ -42,6 +42,10 @@ FILES
 
      BUILDING       This document (in plaintext).
 
+     tools/compat/README
+                    Special notes for cross-hosting a NetBSD build on non-
+                    NetBSD platforms.
+
      Makefile       The main Makefile for NetBSD; should only be run for
                     native builds with an appropriately up-to-date version of
                     NetBSD make(1).  (For building from out-of-date systems or
diff --git a/doc/BUILDING.mdoc b/doc/BUILDING.mdoc
index aa8afe577ec4..563cea20b3c6 100644
--- a/doc/BUILDING.mdoc
+++ b/doc/BUILDING.mdoc
@@ -1,4 +1,4 @@
-.\"	$NetBSD: BUILDING.mdoc,v 1.32 2003/12/19 12:06:45 zuntum Exp $
+.\"	$NetBSD: BUILDING.mdoc,v 1.33 2003/12/29 07:10:24 jmc Exp $
 .\"
 .\" Copyright (c) 2001-2003 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -115,6 +115,8 @@ is not currently supported.
 This document (in -mdoc troff format; the original copy).
 .It Sy BUILDING
 This document (in plaintext).
+.It Sy tools/compat/README
+Special notes for cross-hosting a NetBSD build on non-NetBSD platforms.
 .It Sy Makefile
 The main Makefile for
 .Nx ;