diff --git a/xep-0045.xml b/xep-0045.xml
index 0ea8892e..238d2fcb 100644
--- a/xep-0045.xml
+++ b/xep-0045.xml
@@ -45,6 +45,14 @@
   </schemaloc>
   <registry/>
   &stpeter;
+  <revision>
+    <version>1.28</version>
+    <date>2017-05-31</date>
+    <initials>gl</initials>
+    <remark>
+      <p>Introduce &lt;x/&gt; tag in MUC-PMs to support better Carbon delivery.</p>
+    </remark>
+  </revision>
   <revision>
     <version>1.27.1</version>
     <date>2016-12-03</date>