diff --git a/functions/math.xml b/functions/math.xml
index 9fe64a0965..6516be4a7b 100644
--- a/functions/math.xml
+++ b/functions/math.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.75 $ -->
+<!-- $Revision: 1.76 $ -->
  <reference id="ref.math">
   <title>Mathematical Functions</title>
   <titleabbrev>Math</titleabbrev>
@@ -1261,12 +1261,8 @@ echo pow(-1, 5.5); // error
     <title>Description</title>
      <methodsynopsis>
       <type>int</type><methodname>rand</methodname>
-      <void/>
-     </methodsynopsis>
-     <methodsynopsis>
-      <type>int</type><methodname>rand</methodname>
-      <methodparam><type>int</type><parameter>min</parameter></methodparam>
-      <methodparam><type>int</type><parameter>max</parameter></methodparam>
+      <methodparam choice="opt"><type>int</type><parameter>min</parameter></methodparam>
+      <methodparam choice="opt"><type>int</type><parameter>max</parameter></methodparam>
      </methodsynopsis>
     <simpara>
      If called without the optional <parameter>min</parameter>,