diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index 74478981d0..2e25253a8b 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -1487,6 +1487,21 @@
     </para>
 </section>
 
+<section id='ref-classes-prexport'>
+    <title><filename>prexport.bbclass</filename></title>
+
+    <para>
+        The <filename>prexport</filename> class provides functionality for
+        exporting
+        <link linkend='var-PR'><filename>PR</filename></link> values.
+        <note>
+            This class is not intended to be used directly.
+            Rather, it is enabled when using
+            "<filename>bitbake-prserv-tool export</filename>".
+        </note>
+    </para>
+</section>
+
 <section id='ref-classes-distutils'>
     <title>Python Extensions - <filename>distutils.bbclass</filename></title>