diff --git a/reference/math/functions/rand.xml b/reference/math/functions/rand.xml
index 92176b53de..4da698d07b 100644
--- a/reference/math/functions/rand.xml
+++ b/reference/math/functions/rand.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.19 $ -->
+<!-- $Revision: 1.20 $ -->
 <refentry xml:id="function.rand" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
   <refname>rand</refname>
@@ -9,7 +9,11 @@
   &reftitle.description;
    <methodsynopsis>
     <type>int</type><methodname>rand</methodname>
-    <methodparam choice="opt"><type>int</type><parameter>min</parameter></methodparam>
+    <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>
    </methodsynopsis>
   <simpara>