diff --git a/reference/imap/functions/imap-open.xml b/reference/imap/functions/imap-open.xml
index af0a28cc34..f2cf25e95b 100644
--- a/reference/imap/functions/imap-open.xml
+++ b/reference/imap/functions/imap-open.xml
@@ -14,6 +14,7 @@
    <methodparam><type>string</type><parameter>password</parameter></methodparam>
    <methodparam choice="opt"><type>int</type><parameter>options</parameter><initializer>NIL</initializer></methodparam>
    <methodparam choice="opt"><type>int</type><parameter>n_retries</parameter><initializer>0</initializer></methodparam>
+   <methodparam choice="opt"><type>array</type><parameter>params</parameter><initializer>NULL</initializer></methodparam>
   </methodsynopsis>
   <para>
    Opens an <acronym>IMAP</acronym> stream to a <parameter>mailbox</parameter>.
@@ -251,6 +252,22 @@
       </para>
      </listitem>
     </varlistentry>
+    <varlistentry>
+     <term><parameter>params</parameter></term>
+     <listitem>
+      <para>
+       Connection parameters, the following (string) keys maybe used 
+       to set one or more connection parameters:
+       <itemizedlist>
+        <listitem>
+         <simpara>
+          <literal>DISABLE_AUTHENTICATOR</literal> - Disable authentication properties
+         </simpara>
+        </listitem>
+       </itemizedlist>
+      </para>
+     </listitem>
+    </varlistentry>
    </variablelist>
   </para>
  </refsect1>
@@ -273,6 +290,10 @@
       </row>
      </thead>
      <tbody>
+      <row>
+       <entry>5.3.2</entry>
+       <entry><parameter>params</parameter> added</entry>
+      </row>
       <row>
        <entry>5.2.0</entry>
        <entry><parameter>n_retries</parameter> added</entry>