diff --git a/functions/strings.xml b/functions/strings.xml
index d5ba090ec4..997acb6426 100644
--- a/functions/strings.xml
+++ b/functions/strings.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.158 $ -->
+<!-- $Revision: 1.159 $ -->
  <reference id="ref.strings">
   <title>String functions</title>
   <titleabbrev>Strings</titleabbrev>
@@ -3462,6 +3462,11 @@ $bodytag = str_replace("%body%", "black", "<body text=%body%>");
       <methodparam><type>string</type><parameter>from</parameter></methodparam>
       <methodparam><type>string</type><parameter>to</parameter></methodparam>
      </methodsynopsis>
+     <methodsynopsis>
+      <type>string</type><methodname>strtr</methodname>
+      <methodparam><type>string</type><parameter>str</parameter></methodparam>
+      <methodparam><type>array</type><parameter>replace_pairs</parameter></methodparam>
+     </methodsynopsis>
     <para>
      This function returns a copy of <parameter>str</parameter>,
      translating all occurrences of each character in
