diff --git a/docs/Shorewall-4.xml b/docs/Shorewall-4.xml
index c901560b7..81b149162 100644
--- a/docs/Shorewall-4.xml
+++ b/docs/Shorewall-4.xml
@@ -88,9 +88,10 @@
       </listitem>
     </itemizedlist>
 
-    <para>Both compilers could be installed on your system and you could
-    <ulink url="Shorewall-perl.html#CompilerSelection">use whichever one
-    suited you in a particular case</ulink>.</para>
+    <para><ulink url="Shorewall-perl.html#Install">Both compilers could be
+    installed on your system</ulink> and you could <ulink
+    url="Shorewall-perl.html#CompilerSelection">use whichever one suited you
+    in a particular case</ulink>.</para>
   </section>
 
   <section id="Install">
@@ -127,7 +128,7 @@
   </section>
 
   <section id="Prereqs">
-    <title>Prerequisites for using the Shorewall Version 4.4 Perl-based
+    <title>Prerequisites for using the Shorewall Version 4.2/4.4 Perl-based
     Compiler</title>
 
     <itemizedlist>
@@ -169,6 +170,9 @@
         <para>Perl <emphasis role="bold">Scalar::Util </emphasis>Module</para>
       </listitem>
     </itemizedlist>
+
+    <para>Please note that there are <ulink url="IPv6Support.html">additional
+    requirements</ulink> if you plan to install and use Shorewall6.</para>
   </section>
 
   <section id="Incompatibilities">