diff --git a/reference/mongo/mongocollection.xml b/reference/mongo/mongocollection.xml
index e914f642f1..c24399541b 100644
--- a/reference/mongo/mongocollection.xml
+++ b/reference/mongo/mongocollection.xml
@@ -42,6 +42,20 @@
      </ooclass>
     </classsynopsisinfo>
 <!-- }}} -->
+
+    <classsynopsisinfo role="comment">&Constants;</classsynopsisinfo>
+    <fieldsynopsis>
+     <modifier>const</modifier>
+     <type>int</type>
+     <varname linkend="mongocollection.constants.ascending">MongoCollection::ASCENDING</varname>
+     <initializer>1</initializer>
+    </fieldsynopsis>
+    <fieldsynopsis>
+     <modifier>const</modifier>
+     <type>int</type>
+     <varname linkend="mongocollection.constants.descending">MongoCollection::DESCENDING</varname>
+     <initializer>-1</initializer>
+    </fieldsynopsis>
     
     <classsynopsisinfo role="comment">Fields</classsynopsisinfo>
     <fieldsynopsis>
@@ -68,6 +82,30 @@
 
   </section>
 
+  <section>
+   &reftitle.constants;
+   <variablelist>
+    <varlistentry xml:id="mongocollection.constants.ascending">
+     <term><constant>MongoCollection::ASCENDING</constant></term>
+     <term><constant>1</constant></term>
+     <listitem>
+      <simpara>
+       Ascending direction for sorts and index creation.
+      </simpara>
+     </listitem>
+    </varlistentry>
+    <varlistentry xml:id="mongocollection.constants.descending">
+     <term><constant>MongoCollection::DESCENDING</constant></term>
+     <term><constant>-1</constant></term>
+     <listitem>
+      <simpara>
+       Descending direction for sorts and index creation.
+      </simpara>
+     </listitem>
+    </varlistentry>
+   </variablelist>
+  </section>
+
   <section>
    <title>Fields</title>
    <variablelist>