diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 69698d0398..f509da4d7d 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -10691,6 +10691,13 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     Set this variable to "1" in your
                     <filename>local.conf</filename> file to remove these
                     images.
+                    <note>
+                        Removal of old images and other files in
+                        <filename>tmp/deploy/</filename> is enabled by default
+                        due to the staging method used for those files.
+                        Consequently, the <filename>RM_OLD_IMAGE</filename>
+                        variable is redundant.
+                    </note>
                 </para>
             </glossdef>
         </glossentry>