diff --git a/doc/Pacemaker_Explained/en-US/Author_Group.xml b/doc/Pacemaker_Explained/en-US/Author_Group.xml
index 2c9fd520b3..5e02cde545 100644
--- a/doc/Pacemaker_Explained/en-US/Author_Group.xml
+++ b/doc/Pacemaker_Explained/en-US/Author_Group.xml
@@ -1,10 +1,17 @@
 <?xml version='1.0' encoding='utf-8' ?>
 <!DOCTYPE authorgroup PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
 ]>
 <authorgroup>
   <author>
     <firstname>Andrew</firstname><surname>Beekhof</surname>
     <affiliation><orgname>Red Hat</orgname></affiliation>
+    <contrib>Primary author</contrib>
     <email>andrew@beekhof.net</email>
   </author>
+  <othercredit>
+    <firstname>Philipp</firstname><surname>Marek</surname>
+    <affiliation><orgname>LINBit</orgname></affiliation>
+    <contrib>Style and formatting updates. Indexing.</contrib>
+    <email>philipp.marek@linbit.com</email>
+  </othercredit>
 </authorgroup>