diff --git a/reference/parle/parle.stack.xml b/reference/parle/parle.stack.xml
index da5d7d43c4..a056fb1907 100644
--- a/reference/parle/parle.stack.xml
+++ b/reference/parle/parle.stack.xml
@@ -12,7 +12,7 @@
   <section xml:id="parle-stack.intro">
    &reftitle.intro;
    <para>
-
+	<classname>Parle\Stack</classname> is a LIFO stack. The elements are inserted and and removed only from one end.
    </para>
   </section>
 <!-- }}} -->