diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 51524576b..d5af68297 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -39,6 +39,10 @@
     <listitem>
       <para>2011-03-14</para>
       <itemizedlist>
+        <listitem>
+          <para>[matthew] - Upgrade to M4-1.4.16. Fixes
+          <ulink url="&lfs-ticket-root;2840">#2840</ulink>.</para>
+        </listitem>
         <listitem>
           <para>[matthew] - Upgrade to Ncurses-5.8. Fixes
           <ulink url="&lfs-ticket-root;2838">#2838</ulink>.</para>
diff --git a/chapter01/whatsnew.xml b/chapter01/whatsnew.xml
index 3a75adfa1..5fce2d47a 100644
--- a/chapter01/whatsnew.xml
+++ b/chapter01/whatsnew.xml
@@ -124,9 +124,9 @@
     <listitem>
       <para>Linux &linux-version;</para>
     </listitem>
-    <!--<listitem>
+    <listitem>
       <para>M4 &m4-version;</para>
-    </listitem>-->
+    </listitem>
     <!--<listitem>
       <para>Make &make-version;</para>
     </listitem>-->
diff --git a/packages.ent b/packages.ent
index 88a4ecf6c..db78edbcc 100644
--- a/packages.ent
+++ b/packages.ent
@@ -322,10 +322,10 @@
 <!ENTITY linux-headers-ch6-du "485 MB">
 <!ENTITY linux-headers-ch6-sbu "0.1 SBU">
 
-<!ENTITY m4-version "1.4.15">
-<!ENTITY m4-size "1,099 KB">
+<!ENTITY m4-version "1.4.16">
+<!ENTITY m4-size "1,229 KB">
 <!ENTITY m4-url "&gnu;m4/m4-&m4-version;.tar.bz2">
-<!ENTITY m4-md5 "c7c32540bc3842d5550f88d47ef551d8">
+<!ENTITY m4-md5 "8a7cef47fecab6272eb86a6be6363b2f">
 <!ENTITY m4-home "&gnu-software;m4/">
 <!ENTITY m4-ch5-du "11.6 MB">
 <!ENTITY m4-ch5-sbu "0.2 SBU">