diff --git a/reference/errorfunc/ini.xml b/reference/errorfunc/ini.xml
index c6a0944141..be11dcb1cf 100644
--- a/reference/errorfunc/ini.xml
+++ b/reference/errorfunc/ini.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.29 $ -->
+<!-- $Revision: 1.30 $ -->
 <section id="errorfunc.configuration">
  &reftitle.runtime;
  &extension.runtime;
@@ -432,6 +432,7 @@
       This is to make it easier to find scripts that need to be
       rewritten to using the string concatenator instead
       (<literal>.</literal>).
+      This option doesn't exist as of PHP 4.
      </para>
     </listitem>
    </varlistentry>