diff --git a/documentation/poky-ref-manual/ref-variables.xml b/documentation/poky-ref-manual/ref-variables.xml
index 15bbcee896..24137480c1 100644
--- a/documentation/poky-ref-manual/ref-variables.xml
+++ b/documentation/poky-ref-manual/ref-variables.xml
@@ -25,7 +25,7 @@
        <link linkend='var-HOMEPAGE'>H</link> 
        <link linkend='var-IMAGE_FEATURES'>I</link> 
 <!--               <link linkend='var-glossary-j'>J</link> -->
-       <link linkend='var-KERNEL_IMAGETYPE'>K</link>
+       <link linkend='var-KERNEL_FEATURES'>K</link>
        <link linkend='var-LAYERDIR'>L</link> 
        <link linkend='var-MACHINE'>M</link> 
 <!--               <link linkend='var-glossary-n'>N</link> -->
@@ -580,6 +580,26 @@
 
    <glossdiv id='var-glossary-k'><title>K</title>
 
+        <glossentry id='var-KERNEL_FEATURES'><glossterm>KERNEL_FEATURES</glossterm>
+            <glossdef>
+                <para>Includes additional metadata from the Linux Yocto kernel Git repository.
+                    The metadata includes config fragments and features descriptions,
+                    which usually include patches as well as config fragments.
+                    You typically override the <filename>KERNEL_FEATURES</filename> variable
+                    for a specific machine.</para>
+                <para>For example, the following adds <filename>netfilter</filename> to all 
+                    the Linux Yocto kernels and adds sound support to the <filename>qemux86</filename>
+                    machine:
+                    <literallayout class='monospaced'>
+     # Add netfilter to all linux-yocto kernels
+     KERNEL_FEATURES="features/netfilter"
+
+     # Add sound support to the qemux86 machine
+     KERNEL_FEATURES_append_qemux86="cfg/sound"
+                    </literallayout></para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-KERNEL_IMAGETYPE'><glossterm>KERNEL_IMAGETYPE</glossterm>
             <glossdef>
                 <para>The type of kernel to build for a device, usually set by the