diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 0d3ed4ea8..2921a98ac 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -38,6 +38,9 @@
     <listitem>
       <para>2013-10-06</para>
       <itemizedlist>
+        <listitem>
+          <para>[matthew] - Use xz version of M4 tarball.</para>
+        </listitem>
         <listitem>
           <para>[matthew] - Update to Linux 3.11.4. Fixes
           <ulink url="&lfs-ticket-root;3408">#3408</ulink>.</para>
diff --git a/packages.ent b/packages.ent
index 0104750b4..f0242a7e3 100644
--- a/packages.ent
+++ b/packages.ent
@@ -358,9 +358,9 @@
 <!ENTITY linux-headers-ch6-sbu "0.1 SBU">
 
 <!ENTITY m4-version "1.4.17">
-<!ENTITY m4-size "1,405 KB">
-<!ENTITY m4-url "&gnu;m4/m4-&m4-version;.tar.bz2">
-<!ENTITY m4-md5 "8a1787edcba75ae5cd1dc40d7d8ed03a">
+<!ENTITY m4-size "1,122 KB">
+<!ENTITY m4-url "&gnu;m4/m4-&m4-version;.tar.xz">
+<!ENTITY m4-md5 "12a3c829301a4fd6586a57d3fcf196dc">
 <!ENTITY m4-home "&gnu-software;m4/">
 <!ENTITY m4-ch5-du "30 MB">
 <!ENTITY m4-ch5-sbu "0.2 SBU">