Index: head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml
===================================================================
--- head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml
+++ head/en_US.ISO8859-1/books/handbook/advanced-networking/chapter.xml
@@ -3732,11 +3732,27 @@
 	  interface.</para>
 
 	<note>
-	  <para>In theory, either the Ethernet or wireless MAC address can
-	    be changed to match the other.  However, some popular wireless
-	    interfaces lack support for overriding the MAC address.  We
-	    therefore recommend overriding the Ethernet MAC address for this
-	    purpose.</para>
+	  <para>In theory, either the Ethernet or wireless MAC address
+	    can be changed to match the other.  However, some popular
+	    wireless interfaces lack support for overriding the MAC
+	    address.  We therefore recommend overriding the Ethernet
+	    MAC address for this purpose.</para>
+	</note>
+
+	<note>
+	  <para>If the driver for the wireless interface is not loaded
+	    in the <literal>GENERIC</literal> or custom kernel,
+	    and the computer is running &os;&nbsp;&rel121.current;,
+	    load the corresponding <filename>.ko</filename> in
+	    <filename>/boot/loader.conf</filename> by adding
+	    <userinput><replaceable>driver</replaceable>_load="YES"</userinput>
+	    to that file and rebooting.  Another, better way is to
+	    load the driver in <filename>/etc/rc.conf</filename> by
+	    adding it to <varname>kld_list</varname> (see
+	    &man.rc.conf.5; for details) in that file and rebooting.
+	    This is needed because otherwise the driver is not loaded
+	    yet at the time the &man.lagg.4; interface is set
+	    up.</para>
 	</note>
 
 	<para>In this example, the Ethernet interface,