diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index f28c62454b..22a0505523 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -856,6 +856,20 @@
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-BUILDSTATS_BASE'><glossterm>BUILDSTATS_BASE</glossterm>
+            <glossdef>
+                <para>
+                    Points to the location of the directory that holds build
+                    statistics when you use and enable the
+                    <link linkend='ref-classes-buildstats'><filename>buildstats</filename></link>
+                    class.
+                    The <filename>BUILDSTATS_BASE</filename> directory defaults
+                    to
+                    <filename>${</filename><link linkend='var-TMPDIR'><filename>TMPDIR</filename></link><filename>}/buildstats/</filename>.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-BUSYBOX_SPLIT_SUID'><glossterm>BUSYBOX_SPLIT_SUID</glossterm>
             <glossdef>
                 <para>