diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index b1a8e64ce0..f08b7fefc8 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -86,9 +86,9 @@
                 the <filename><link linkend='var-EXTRA_OEMAKE'>EXTRA_OEMAKE</link></filename> variable.
                 </para></listitem>
             <listitem><para><filename>do_install</filename> &dash; Runs <filename>make install</filename>
-                and passes a destination directory option, which takes its value
-                from the standard
-                <filename><link linkend='var-DESTDIR'>DESTDIR</link></filename> variable.
+                and passes in
+                <filename>${</filename><link linkend='var-D'><filename>D</filename></link><filename>}</filename>
+                as <filename>DESTDIR</filename>.
                 </para></listitem>
         </itemizedlist>
     </para>