diff --git a/functions/pcre.xml b/functions/pcre.xml
index 34f1e38aca..d5ac05346c 100644
--- a/functions/pcre.xml
+++ b/functions/pcre.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.71 $ -->
+<!-- $Revision: 1.72 $ -->
 <reference id="ref.pcre">
   <title>Regular Expression Functions (Perl-Compatible)</title>
   <titleabbrev>PCRE</titleabbrev>   
@@ -512,7 +512,7 @@ $text = preg_replace ($search, $replace, $document);
     <para>
      The behavior of this function is almost identical to
      <function>preg_replace</function>, except for the fact that instead of
-     <parameter>replacement</parameter> parameter, once should specify a
+     <parameter>replacement</parameter> parameter, one should specify a
      <parameter>callback</parameter> that will be called and passed an array of
      matched elements in the subject string. The callback should return the
      replacement string. This function was added in PHP 4.0.5.