diff --git a/assembly/src/sample-conf/activemq-jdbc.xml b/assembly/src/sample-conf/activemq-jdbc.xml
index 6ea4196551..d461c7de8e 100644
--- a/assembly/src/sample-conf/activemq-jdbc.xml
+++ b/assembly/src/sample-conf/activemq-jdbc.xml
@@ -42,6 +42,10 @@
   </bean>
 
   <broker useJmx="false" brokerName="jdbcBroker" xmlns="http://activemq.apache.org/schema/core">
+
+    <!--
+        See more database locker options at http://activemq.apache.org/pluggable-storage-lockers.html
+    -->
     <persistenceAdapter>
        <jdbcPersistenceAdapter dataDirectory="${activemq.data}" dataSource="#derby-ds"/>
     </persistenceAdapter>