diff --git a/developer-activity/src/plugin-resources/developer-activity.jsl b/developer-activity/src/plugin-resources/developer-activity.jsl
index 9a3b3a92..35c08682 100644
--- a/developer-activity/src/plugin-resources/developer-activity.jsl
+++ b/developer-activity/src/plugin-resources/developer-activity.jsl
@@ -31,8 +31,8 @@
             </tr>
             <j:forEach var="developer" items="${pom.developers}">
               <j:set var="name" value="${developer.name}"/>
-              <x:set var="commits" select="count(./changelog-entry/author[text()='${name}'])"/>
-              <x:set var="changedFiles" select="count(./changelog-entry/author[text()='${name}']/../file)"/>
+              <j:set var="commits"><x:expr select="count(./changelog-entry/author[text()='${name}'])"/></j:set>
+              <j:set var="changedFiles"><x:expr select="count(./changelog-entry/author[text()='${name}']/../file)"/></j:set>
 
               <j:if test="${commits != '0'}">
                 <tr>