<listitem><para>Takes a boolean argument. Configures whether packets
should be prepened with four extra bytes (two flag bytes and two
protocol bytes). If disabled it indicates that the packets will be
- pure IP packets. Defaults to <literal>yes</literal>.</para>
+ pure IP packets. Defaults to <literal>no</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>