diff --git a/reference/strings/functions/setlocale.xml b/reference/strings/functions/setlocale.xml
index ac097ec16c..77ef5b52bc 100644
--- a/reference/strings/functions/setlocale.xml
+++ b/reference/strings/functions/setlocale.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.20 $ -->
+<!-- $Revision: 1.21 $ -->
 <!-- splitted from ./en/functions/strings.xml, last change in rev 1.2 -->
   <refentry id="function.setlocale">
    <refnamediv>
@@ -95,6 +95,7 @@
      An invalid category name also causes a warning message. Category/locale
      names can be found in <ulink url="&url.rfc;1766">RFC 1766</ulink>
      and <ulink url="&url.iso-639;">ISO 639</ulink>.
+     Different systems have different naming schemes for locales.
     </para>
     <note>
      <para>