diff --git a/xep-0060.xml b/xep-0060.xml
index 745f5e7f..66aa990f 100644
--- a/xep-0060.xml
+++ b/xep-0060.xml
@@ -1499,7 +1499,7 @@ And by opposing end them?
       ]]></example>
     </section3>
     <section3 topic='Success Case' anchor='subscriber-unsubscribe-success'>
-      <p>If the request can be successfully processed, the service MUST return an IQ result and SHOULD include a &PUBSUB; child element with the updated &lt;subscription/&gt; element for that node.</p>
+      <p>If the request can be successfully processed, the service MUST return an IQ result and MAY include a &PUBSUB; child element with the updated &lt;subscription/&gt; element for that node.</p>
       <example caption='Service replies with success'><![CDATA[
 <iq type='result'
     from='pubsub.shakespeare.lit'