diff --git a/en_US.ISO8859-1/books/Makefile b/en_US.ISO8859-1/books/Makefile
index 27f66dccc7..de2ed2f597 100644
--- a/en_US.ISO8859-1/books/Makefile
+++ b/en_US.ISO8859-1/books/Makefile
@@ -1,14 +1,15 @@
-# $FreeBSD: doc/en_US.ISO_8859-1/books/Makefile,v 1.8 2001/02/20 20:02:18 nik Exp $
+# $FreeBSD: doc/en_US.ISO_8859-1/books/Makefile,v 1.9 2001/04/09 20:41:33 nik Exp $
 
 SUBDIR = corp-net-guide
 SUBDIR+= design-44bsd
+SUBDIR+= developers-handbook
 SUBDIR+= faq
 SUBDIR+= fdp-primer
 SUBDIR+= handbook
 SUBDIR+= porters-handbook
 SUBDIR+= ppp-primer
 
 ROOT_SYMLINKS= faq handbook
 
 DOC_PREFIX?= ${.CURDIR}/../..
 .include "${DOC_PREFIX}/share/mk/doc.project.mk"
diff --git a/en_US.ISO_8859-1/books/Makefile b/en_US.ISO_8859-1/books/Makefile
index 27f66dccc7..de2ed2f597 100644
--- a/en_US.ISO_8859-1/books/Makefile
+++ b/en_US.ISO_8859-1/books/Makefile
@@ -1,14 +1,15 @@
-# $FreeBSD: doc/en_US.ISO_8859-1/books/Makefile,v 1.8 2001/02/20 20:02:18 nik Exp $
+# $FreeBSD: doc/en_US.ISO_8859-1/books/Makefile,v 1.9 2001/04/09 20:41:33 nik Exp $
 
 SUBDIR = corp-net-guide
 SUBDIR+= design-44bsd
+SUBDIR+= developers-handbook
 SUBDIR+= faq
 SUBDIR+= fdp-primer
 SUBDIR+= handbook
 SUBDIR+= porters-handbook
 SUBDIR+= ppp-primer
 
 ROOT_SYMLINKS= faq handbook
 
 DOC_PREFIX?= ${.CURDIR}/../..
 .include "${DOC_PREFIX}/share/mk/doc.project.mk"