diff --git a/functions/math.xml b/functions/math.xml
index 22db4fccbb..2d3adbd6da 100644
--- a/functions/math.xml
+++ b/functions/math.xml
@@ -1,4 +1,4 @@
-<!-- $Revision: 1.42 $ -->
+<!-- $Revision: 1.43 $ -->
  <reference id="ref.math">
   <title>Mathematical Functions</title>
   <titleabbrev>Math</titleabbrev>
@@ -1054,8 +1054,8 @@ echo pow(-1, 5.5); // error
       <paramdef>
        <parameter><optional>int min</optional></parameter>
       </paramdef>
-      <paramdef>
-       <parameter>int max</parameter>
+      <paramdef>int
+       <parameter><optional>max</optional></parameter>
       </paramdef>
      </funcprototype>
     </funcsynopsis>