diff --git a/reference/tokyo_tyrant/tokyotyrant/put.xml b/reference/tokyo_tyrant/tokyotyrant/put.xml
index 5aba7cf29a..17be9df0ef 100644
--- a/reference/tokyo_tyrant/tokyotyrant/put.xml
+++ b/reference/tokyo_tyrant/tokyotyrant/put.xml
@@ -12,7 +12,7 @@
   <methodsynopsis>
    <modifier>public</modifier> <type>TokyoTyrant</type><methodname>TokyoTyrant::put</methodname>
    <methodparam><type>mixed</type><parameter>keys</parameter></methodparam>
-   <methodparam choice="opt"><type>string</type><parameter>value</parameter></methodparam>
+   <methodparam choice="opt"><type>string</type><parameter>value</parameter><initializer>NULL</initializer></methodparam>
   </methodsynopsis>
   <para>
    Puts a key-value pair into the database or multiple key-value pairs. If <parameter>keys</parameter> is