diff --git a/Shorewall-docs2/shorewall_prerequisites.xml b/Shorewall-docs2/shorewall_prerequisites.xml
index 00d52c374..bd9f17e1d 100644
--- a/Shorewall-docs2/shorewall_prerequisites.xml
+++ b/Shorewall-docs2/shorewall_prerequisites.xml
@@ -13,7 +13,7 @@
       <surname>Eastep</surname>
     </author>
 
-    <pubdate>2005-05-03</pubdate>
+    <pubdate>2005-05-12</pubdate>
 
     <copyright>
       <year>2001-2005</year>
@@ -37,8 +37,9 @@
 
     <itemizedlist>
       <listitem>
-        <para>A kernel that supports netfilter. I've tested with 2.4.2 -
-        2.6.11. Check <ulink url="kernel.htm">here</ulink> for kernel
+        <para>A <emphasis role="bold">Linux</emphasis> kernel that supports
+        netfilter (No, it won't work on BSD or Solaris). I've tested with
+        2.4.2 - 2.6.11. Check <ulink url="kernel.htm">here</ulink> for kernel
         configuration information.</para>
       </listitem>
 
@@ -84,4 +85,4 @@
       </listitem>
     </itemizedlist>
   </section>
-</article>
\ No newline at end of file
+</article>