diff --git a/prologue/organization.xml b/prologue/organization.xml
index d88f4938d..c95a1907c 100644
--- a/prologue/organization.xml
+++ b/prologue/organization.xml
@@ -7,7 +7,7 @@
 <title>Structure</title>
 <?dbhtml filename="organization.html"?>
 
-<para>This book is divided into the following four parts:</para>
+<para>This book is divided into the following parts:</para>
 
 <sect2>
 <title>Part I - Introduction</title>