diff --git a/reference/xsl/constants.xml b/reference/xsl/constants.xml
index f50014712b..0517a869be 100644
--- a/reference/xsl/constants.xml
+++ b/reference/xsl/constants.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.2 $ -->
+<!-- $Revision: 1.3 $ -->
 <section id="xsl.constants">
  &reftitle.constants;
  &extension.constants;
@@ -63,7 +63,7 @@
    </term>
    <listitem>
     <simpara>
-     libxslt version like 813. Available as of PHP 5.1.2.
+     libexslt version like 813. Available as of PHP 5.1.2.
     </simpara>
    </listitem>
   </varlistentry>
@@ -74,7 +74,7 @@
    </term>
    <listitem>
     <simpara>
-     libxslt version like 1.1.17. Available as of PHP 5.1.2.
+     libexslt version like 1.1.17. Available as of PHP 5.1.2.
     </simpara>
    </listitem>
   </varlistentry>