diff --git a/ja_JP.eucJP/books/ppp-primer/book.sgml b/ja_JP.eucJP/books/ppp-primer/book.sgml
index 846fce455a..03ac24d245 100644
--- a/ja_JP.eucJP/books/ppp-primer/book.sgml
+++ b/ja_JP.eucJP/books/ppp-primer/book.sgml
@@ -1,4 +1,8 @@
-<!DOCTYPE BOOK PUBLIC "-//FreeBSD//DTD DocBook V4.1-Based Extension//EN">
+<!DOCTYPE BOOK PUBLIC "-//FreeBSD//DTD DocBook V4.1-Based Extension//EN" [
+<!ENTITY % man PUBLIC "-//FreeBSD//ENTITIES DocBook Manual Page Entities//EN">
+%man;
+]>
+
 <!-- The FreeBSD Japanese Documentation Project -->
 <!-- Original revision: 1.16 -->
 <!-- $FreeBSD$ -->