diff --git a/documentation/ref-manual/closer-look.xml b/documentation/ref-manual/closer-look.xml
index e13f5c1601..683fa42259 100644
--- a/documentation/ref-manual/closer-look.xml
+++ b/documentation/ref-manual/closer-look.xml
@@ -1214,6 +1214,10 @@
                     of the SDK (i.e. the part built for the
                     target hardware).
                     </para></listitem>
+                <listitem><para><link linkend='var-SDKPATH'><filename>SDKPATH</filename></link>:
+                    Defines the default SDK installation path offered by the
+                    installation script.
+                    </para></listitem>
             </itemizedlist>
         </para>
     </section>