diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index a648a9e7a9..5f2a2a716c 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -2868,6 +2868,18 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-RM_WORK_EXCLUDE'><glossterm>RM_WORK_EXCLUDE</glossterm>
+            <glossdef>
+                <para>
+                    With <filename>rm_work</filename> enabled, this 
+                    variable specifies a list of packages whose work directories 
+                    should not be removed.
+                    See the "<link linkend='ref-classes-rm-work'>Removing Work Files During the Build - <filename>rm_work.bbclass</filename></link>"
+                    section for more details.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-RRECOMMENDS'><glossterm>RRECOMMENDS</glossterm>
             <glossdef>
                 <para>