diff --git a/doc/publican/Foreword.xml b/doc/publican/Foreword.xml
index 46fda2be..97908356 100644
--- a/doc/publican/Foreword.xml
+++ b/doc/publican/Foreword.xml
@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='utf-8' ?>
-<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+<!DOCTYPE preface PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
 "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
 <!ENTITY % BOOK_ENTITIES SYSTEM "Wayland.ent">
 %BOOK_ENTITIES;