diff --git a/xep-0369.xml b/xep-0369.xml
index 04defa69..4de20511 100644
--- a/xep-0369.xml
+++ b/xep-0369.xml
@@ -349,7 +349,8 @@
       <field var='FORM_TYPE' type='hidden'>
         <value>urn:xmpp:mix:0#serviceinfo</value>
       </field>
-      <field
+      <field var='muc-mirror'
+             type='jid-single'
              label='Location of MUC mirror service'>
         <value>chat.shakespeare.example</value>
       </field>
@@ -358,7 +359,7 @@
 </iq>
 ]]></example>
     <p>The result is returned in an extended disco results in a form whose type value is 'urn:xmpp:mix:0#serviceinfo'.
-      If the MIX service is mirrored to a MUC service for backwards-compatibility, this SHOULD be signaled by the inclusion of field with label 'Location of MUC mirror service', the value of which is the mirrored MUC domain.  Where a MIX server supports MIX channels as &xep0045; rooms, the domain used for MUC may be different to the MIX domain or it MAY be the same.</p>
+      If the MIX service is mirrored to a MUC service for backwards-compatibility, this SHOULD be signaled by the inclusion of field with var='muc-mirror', the value of which is the mirrored MUC domain's JID.  Where a MIX server supports MIX channels as &xep0045; rooms, the domain used for MUC may be different to the MIX domain or it MAY be the same.</p>
     <p>Note that the MIX service itself doesn't advertise support for &xep0313;, nor is support for generic &xep0060; advertised.</p>
   </section2>
   <section2 topic='Discovering the Channels on a Service' anchor='disco-channel-list'>