diff --git a/reference/session/sessionupdatetimestamphandlerinterface/updatetimestamp.xml b/reference/session/sessionupdatetimestamphandlerinterface/updatetimestamp.xml
index 7a3245b4c6d6..0b5472ab4a88 100644
--- a/reference/session/sessionupdatetimestamphandlerinterface/updatetimestamp.xml
+++ b/reference/session/sessionupdatetimestamphandlerinterface/updatetimestamp.xml
@@ -34,7 +34,7 @@
     <term><parameter>data</parameter></term>
     <listitem>
      <para>
-      The session data.
+      The session data. The serialized session data may be used to determine whether the session data has changed and therefore should be updated.
      </para>
     </listitem>
    </varlistentry>