diff --git a/internals/zendapi/functions/add_property_unset.xml b/internals/zendapi/functions/add_property_unset.xml
new file mode 100644
index 0000000000..80746f7786
--- /dev/null
+++ b/internals/zendapi/functions/add_property_unset.xml
@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- $Revision: 1.1 $ -->
+<refentry id="zend-api.add-property-unset">
+ <refnamediv>
+  <refname>add_property_unset</refname>
+  <refpurpose>...</refpurpose>
+ </refnamediv>
+
+ <refsect1 role="description">
+  &reftitle.description;
+  <literallayout>#include &lt;zend_API.h&gt;</literallayout>
+  <methodsynopsis>
+   <type>int</type><methodname>add_property_unset</methodname>
+    <methodparam><type>zval*</type><parameter>arg</parameter></methodparam>
+    <methodparam><type>char*</type><parameter>key</parameter></methodparam>
+  </methodsynopsis>
+  <para>
+   ...
+  </para>
+ </refsect1>
+
+ <refsect1 role="parameters">
+  &reftitle.parameters;
+  <para>
+   <variablelist>
+    <varlistentry>
+     <term><parameter>arg</parameter></term>
+     <listitem>
+      <para>
+       ...
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term><parameter>key</parameter></term>
+     <listitem>
+      <para>
+       ...
+      </para>
+     </listitem>
+    </varlistentry>
+   </variablelist>
+  </para>
+ </refsect1>
+
+ <refsect1 role="returnvalues">
+  &reftitle.returnvalues;
+  <para>
+   ...
+  </para>
+ </refsect1>
+
+</refentry>
+
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:t
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+indent-tabs-mode:nil
+sgml-parent-document:nil
+sgml-default-dtd-file:"../../../../manual.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:nil
+sgml-local-ecat-files:nil
+End:
+vim600: syn=xml fen fdm=syntax fdl=2 si
+vim: et tw=78 syn=sgml
+vi: ts=1 sw=1
+-->