diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 0265bdffb5..5dfcc49d85 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -1456,7 +1456,8 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     to the other <filename>INITSCRIPT_*</filename> as an override.</para>
                  <para>
                     This variable is used in recipes when using <filename>update-rc.d.bbclass</filename>.
-                    The variable is optional and defaults to the <filename>PN</filename> variable.
+                    The variable is optional and defaults to the
+                    <link linkend='var-PN'><filename>PN</filename></link> variable.
                 </para>
            </glossdef>
         </glossentry>