diff --git a/reference/regex/reference.xml b/reference/regex/reference.xml
index bd2034d856..91eaf08ce5 100644
--- a/reference/regex/reference.xml
+++ b/reference/regex/reference.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.13 $ -->
+<!-- $Revision: 1.14 $ -->
 <!-- Purpose: basic.text -->
 <!-- Membership: core -->
 
@@ -75,7 +75,7 @@ ereg("^abc", $string);
 ereg("abc$", $string);
 
 // Returns true if client browser is Netscape 2, 3 or MSIE 3.
-eregi("(ozilla.[23]|MSIE.3)", $HTTP_USER_AGENT);  
+eregi("(ozilla.[23]|MSIE.3)", $_SERVER["HTTP_USER_AGENT"]);
 
 // Places three space separated words into $regs[1], $regs[2] and $regs[3].
 ereg("([[:alnum:]]+) ([[:alnum:]]+) ([[:alnum:]]+)", $string, $regs);