diff --git a/reference/http/functions/setcookie.xml b/reference/http/functions/setcookie.xml
index 413b61719e..bde2a070ea 100644
--- a/reference/http/functions/setcookie.xml
+++ b/reference/http/functions/setcookie.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.29 $ -->
+<!-- $Revision: 1.30 $ -->
 <!-- splitted from ./en/functions/http.xml, last change in rev 1.2 -->
   <refentry id="function.setcookie">
    <refnamediv>
@@ -318,6 +318,10 @@ one : cookieone
       HH:MM:SS GMT</literal>, this is because PHP does this conversion
       internally.
      </para>
+     <para>
+      <parameter>expire</parameter> is compared to the client's time which can
+      differ from server's time.
+     </para>
     </note>
     <note>
      <simpara>