1 files changed, 13 insertions, 1 deletions

diff --git a/documentation/poky-ref-manual/ref-variables.xml b/documentation/poky-ref-manual/ref-variables.xml
index 7f51fc9885..0bde65915c 100644
--- a/documentation/poky-ref-manual/ref-variables.xml
+++ b/documentation/poky-ref-manual/ref-variables.xml
@@ -679,7 +679,19 @@
 
         <glossentry id='var-PACKAGE_CLASSES'><glossterm>PACKAGE_CLASSES</glossterm>
             <glossdef>
-                <para>Specifies the list of resulting package formats.</para>
+                <para>This variable, which is set in the <filename>local.conf</filename> configuration
+                    file found in the Yocto Project file's <filename>conf</filename> directory,
+                    specifies the package manager to use when packaging data.
+                    You can provide one or more arguments for the variable with the first 
+                    argument being the package manager used to create images:
+                    <literallayout class='monospaced'>
+     PACKAGE_CLASSES ?= "package_rpm package_deb package_ipk"
+                    </literallayout>
+                    For information on build performance effects as a result of the 
+                    package manager use, see
+                    <link linkend='ref-classes-package'>Packaging - <filename>package*.bbclass</filename></link>
+                    in this manual.
+                </para>
             </glossdef>
         </glossentry>