diff --git a/book/part1.xml b/book/part1.xml
index 31c377a09..e978daaea 100644
--- a/book/part1.xml
+++ b/book/part1.xml
@@ -1,7 +1,7 @@
 <part id="part1">
 <title>Part I - Introduction</title>
 
-&chapter1;
-&chapter2;
+&chapter01;
+&chapter02;
 
 </part>
diff --git a/book/part2.xml b/book/part2.xml
index c8ebcc95f..d37fbec33 100644
--- a/book/part2.xml
+++ b/book/part2.xml
@@ -1,12 +1,12 @@
 <part id="part2">
 <title>Part II - Installing the LFS system</title>
 
-&chapter3;
-&chapter4;
-&chapter5;
-&chapter6;
-&chapter7;
-&chapter8;
-&chapter9;
+&chapter03;
+&chapter04;
+&chapter05;
+&chapter06;
+&chapter07;
+&chapter08;
+&chapter09;
 
 </part>