diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 97dcb5c35f..d6b5eaf7d6 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -3641,9 +3641,9 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     as set in the <filename>meta/conf/bitbake.conf</filename> file
                     is:
                     <literallayout class='monospaced'>
-     STAMP = "${TMPDIR}/stamps/${MULTIMACH_TARGET_SYS}/${PN}/${EXTENDPE}${PV}-${PR}"
+     STAMP = "${STAMPS_DIR}/${MULTIMACH_TARGET_SYS}/${PN}/${EXTENDPE}${PV}-${PR}"
                     </literallayout>
-                    See <link linkend='var-TMPDIR'><filename>TMPDIR</filename></link>,
+                    See <link linkend='var-STAMPS_DIR'><filename>STAMPS_DIR</filename></link>,
                     <link linkend='var-MULTIMACH_TARGET_SYS'><filename>MULTIMACH_TARGET_SYS</filename></link>,
                     <link linkend='var-PN'><filename>PN</filename></link>,
                     <link linkend='var-EXTENDPE'><filename>EXTENDPE</filename></link>,
@@ -3654,6 +3654,17 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-STAMPS_DIR'><glossterm>STAMPS_DIR</glossterm>
+            <glossdef>
+                <para>
+                    Specifies the base directory in which the OpenEmbedded 
+                    build system places stamps.
+                    The default directory is 
+                    <filename>${TMPDIR}/stamps</filename>.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-SUMMARY'><glossterm>SUMMARY</glossterm>
             <glossdef>
                 <para>The short (72 characters or less) summary of the binary package for packaging