diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index b3a94942b9..a90a3a0272 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -575,6 +575,20 @@ Core layer for images cannot be removed
                 </para>
             </glossdef>
         </glossentry>
+
+<!--
+        <glossentry id='var-BUILDHISTORY_CHECKVERBACKWARDS'><glossterm>BUILDHISTORY_CHECKVERBACKWARDS</glossterm>
+            <glossdef>
+                <para>
+                    When Build History is enabled, setting this variable to "0"
+                    disables the check for package versions going backwards.
+                    During 1.5 development, a patch surfaced late that might
+                    eliminate the need for this variable.
+                    I am commenting it out for now until more is known.
+                </para>
+            </glossdef>
+        </glossentry>
+-->
     </glossdiv>
 
     <glossdiv id='var-glossary-c'><title>C</title>