diff --git a/xep-0004.xml b/xep-0004.xml
index b2522df2..eb3112e7 100644
--- a/xep-0004.xml
+++ b/xep-0004.xml
@@ -241,7 +241,7 @@
       </tr>
       <tr>
         <td>jid-multi</td>
-        <td>The field enables an entity to gather or provide multiple Jabber IDs. *</td>
+        <td>The field enables an entity to gather or provide multiple Jabber IDs. Each provided JID SHOULD be unique (as determined by comparison that includes application of the Nodeprep, Nameprep, and Resourceprep profiles of Stringprep as specified in <cite>XMPP Core</cite>), and duplicate JIDs MUST be ignored. *</td>
       </tr>
       <tr>
         <td>jid-single</td>