diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 959b8c3418..bfd1429558 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -2210,6 +2210,31 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-MIRRORS'><glossterm>MIRRORS</glossterm>
+            <glossdef>
+                <para>
+                    Specifies additional paths from which the OpenEmbedded
+                    build system gets source code.
+                    When the build system searches for source code, it first
+                    tries the local download directory.
+                    If that location fails, the build system tries locations
+                    defined by
+                    <link linkend='var-PREMIRRORS'><filename>PREMIRRORS</filename></link>,
+                    the upstream source, and then locations specified by
+                    <filename>MIRRORS</filename> in that order.
+                </para>
+
+                <para>
+                    Assuming your distribution
+                    (<link linkend='var-DISTRO'><filename>DISTRO</filename></link>)
+                    is "poky", the default value for
+                    <filename>MIRRORS</filename> is defined in the
+                    <filename>conf/distro/poky.conf</filename> file in the
+                    <filename>meta-yocto</filename> Git repository.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-MLPREFIX'><glossterm>MLPREFIX</glossterm>
             <glossdef>
                 <para>