diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 7d720c86b3..97dcb5c35f 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -2167,6 +2167,21 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-LOG_DIR'><glossterm>LOG_DIR</glossterm>
+            <glossdef>
+                <para>
+                    Specifies the directory to which the OpenEmbedded build 
+                    system writes overall log files.
+                    The default directory is <filename>${TMPDIR}/log</filename>.
+                </para>
+                <para>
+                    For the directory containing logs specific to each task,
+                    see the <link linkend='var-T'><filename>T</filename></link>
+                    variable.
+                </para>
+            </glossdef>
+        </glossentry>
+
     </glossdiv>
 
     <glossdiv id='var-glossary-m'><title>M</title>