diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 7d2a71c300..96336babf0 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -6589,6 +6589,9 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     the command, you can use
                     <filename>${IMAGE_ROOTFS}</filename>, which points to
                     the root filesystem image.
+                    See the
+                    <link linkend='var-IMAGE_ROOTFS'><filename>IMAGE_ROOTFS</filename></link>
+                    variable for more information.
                 </para>
             </glossdef>
         </glossentry>