diff --git a/reference/spl/book.xml b/reference/spl/book.xml
index 6a0f57096a..9a75f47083 100644
--- a/reference/spl/book.xml
+++ b/reference/spl/book.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
 
 <book xml:id="book.spl" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
  <title>Standard PHP Library (SPL)</title>
@@ -21,6 +21,7 @@
 
  &reference.spl.setup;
  &reference.spl.constants;
+ &reference.spl.datastructures;
  &reference.spl.reference;
 
  &reference.spl.arrayiterator;
@@ -35,6 +36,11 @@
  &reference.spl.recursiveiteratoriterator;
  &reference.spl.simplexmliterator;
 
+ &reference.spl.spldoublylinkedlist;
+ &reference.spl.splstack;
+ &reference.spl.splqueue;
+
+
 </book>
 
 <!-- Keep this comment at the end of the file