diff --git a/en_US.ISO8859-1/books/faq/book.sgml b/en_US.ISO8859-1/books/faq/book.sgml
index 1b379e424c..61a8427a73 100644
--- a/en_US.ISO8859-1/books/faq/book.sgml
+++ b/en_US.ISO8859-1/books/faq/book.sgml
@@ -7582,7 +7582,7 @@ Key F15        A        A        Menu Workplace Nop</programlisting>
 
           <para>Try disabling the TCP extensions in
             <filename>/etc/rc.conf</filename> (see &man.rc.conf.5;) by
-            changing the following variable to NO:</para>
+            changing the following variable to <literal>NO</literal>:</para>
 
           <programlisting>tcp_extensions=NO</programlisting>