diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 6306194aa0..baf29ea157 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -506,6 +506,15 @@
     </para>
 </section>
 
+<section id='ref-classes-distrodata'>
+    <title><filename>distrodata.bbclass</filename></title>
+
+    <para>
+        The Distribution Data (<filename>distrodata</filename>) class
+        provides for automatic checking for upstream recipe updates.
+    </para>
+</section>
+
 <section id='ref-classes-debian'>
     <title>Debian Renaming - <filename>debian.bbclass</filename></title>