diff --git a/doc/flatpak-builder.xml b/doc/flatpak-builder.xml
index 77de49496..bcbaf8c94 100644
--- a/doc/flatpak-builder.xml
+++ b/doc/flatpak-builder.xml
@@ -289,6 +289,10 @@
                     <term><option>build-args</option> (array of strings)</term>
                     <listitem><para>This is an array containing extra options to pass to flatpak build.</para></listitem>
                 </varlistentry>
+                <varlistentry>
+                    <term><option>config-opts</option> (array of strings)</term>
+                    <listitem><para>This is an array containing extra options to pass to configure.</para></listitem>
+                </varlistentry>
                 <varlistentry>
                     <term><option>strip</option> (boolean)</term>
                     <listitem><para>If this is true (the default is false) then all ELF files will be stripped after install.</para></listitem>