diff --git a/docs/configuration_file_basics.xml b/docs/configuration_file_basics.xml
index 9b94f1a03..3d000ca42 100644
--- a/docs/configuration_file_basics.xml
+++ b/docs/configuration_file_basics.xml
@@ -2326,7 +2326,8 @@ Comcast 2        0x20000 main       <emphasis role="bold">COM_IF</emphasis>
     </itemizedlist>
 
     <para>If you don't want the firewall to start unless a given interface is
-    usable, then specify required in the OPTIONS column of <ulink
+    usable, then specify <emphasis role="bold">required</emphasis> in the
+    OPTIONS column of <ulink
     url="manpages/shorewall-interfaces.html">shorewall-interfaces</ulink> (5).
     If you have installed and configured the Shorewall-init package, then when
     the interface becomes available, an automatic attempt will be made to