diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index b0410d360..857e4d349 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -40,6 +40,10 @@
     <listitem>
       <para>2008-10-11</para>
       <itemizedlist>
+        <listitem>
+          <para>[randy] - Added commands to the Chapter 6 Flex instructions
+          to install a .pdf doc file.</para>
+        </listitem>
         <listitem>
           <para>[randy] - Added a parameter to the configure command in the
           Automake instructions so that docs are installed in a versioned
diff --git a/chapter06/flex.xml b/chapter06/flex.xml
index e7bad3340..94d8af1fd 100644
--- a/chapter06/flex.xml
+++ b/chapter06/flex.xml
@@ -80,6 +80,13 @@ exec /usr/bin/flex -l "$@"
 EOF
 chmod -v 755 /usr/bin/lex</userinput></screen>
 
+    <para>If desired, install the <filename>flex.pdf</filename> documentation
+    file:</para>
+
+<screen><userinput remap="install">mkdir -v /usr/share/doc/flex-&flex-version;
+cp    -v doc/flex.pdf \
+         /usr/share/doc/flex-&flex-version;</userinput></screen>
+
   </sect2>
 
   <sect2 id="contents-flex" role="content">