diff --git a/en_US.ISO8859-1/books/Makefile b/en_US.ISO8859-1/books/Makefile
index ed5a5d872b..6c3d333cdb 100644
--- a/en_US.ISO8859-1/books/Makefile
+++ b/en_US.ISO8859-1/books/Makefile
@@ -1,10 +1,11 @@
-# $FreeBSD$
+# $FreeBSD: doc/en_US.ISO_8859-1/books/Makefile,v 1.5 1999/09/06 06:52:39 peter Exp $
 
 SUBDIR = faq
 SUBDIR+= fdp-primer
 SUBDIR+= 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 ed5a5d872b..6c3d333cdb 100644
--- a/en_US.ISO_8859-1/books/Makefile
+++ b/en_US.ISO_8859-1/books/Makefile
@@ -1,10 +1,11 @@
-# $FreeBSD$
+# $FreeBSD: doc/en_US.ISO_8859-1/books/Makefile,v 1.5 1999/09/06 06:52:39 peter Exp $
 
 SUBDIR = faq
 SUBDIR+= fdp-primer
 SUBDIR+= handbook
+SUBDIR+= ppp-primer
 
 ROOT_SYMLINKS= faq handbook
 
 DOC_PREFIX?= ${.CURDIR}/../..
 .include "${DOC_PREFIX}/share/mk/doc.project.mk"