diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index e417c256a7..2335209084 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -4628,6 +4628,14 @@
                             by the <filename>--size</filename> option.
                             The default value is 10 Mbytes.
                             </para></listitem>
+                        <listitem><para><emphasis><filename>--overhead-factor</filename>:</emphasis>
+                            This option is a <filename>wic</filename>-specific
+                            option that multiplies the size of the partition by
+                            the option's value.
+                            You must supply a value greater than or equal to
+                            "1".
+                            The default value is "1.3".
+                            </para></listitem>
                     </itemizedlist>
                 </para>
             </section>