diff --git a/reference/zip/constants.xml b/reference/zip/constants.xml
index 9cef621eed..fa4d87bf40 100644
--- a/reference/zip/constants.xml
+++ b/reference/zip/constants.xml
@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='iso-8859-1'?>
-<!-- $Revision: 1.3 $ -->
+<!-- $Revision: 1.4 $ -->
 <section id="zip.constants">
  &reftitle.constants;
  &extension.constants;
@@ -21,6 +21,18 @@
     </simpara>
    </listitem>
   </varlistentry>
+  <varlistentry>
+   <term>
+    <constant>ZIPARCHIVE::OVERWRITE</constant>
+     (<type>integer</type>)
+   </term>
+   <listitem>
+    <simpara>
+     Always start a new archive, this mode will overwrite the file if
+     it already exists.
+    </simpara>
+   </listitem>
+  </varlistentry>
 
   <varlistentry>
    <term>