diff --git a/en_US.ISO8859-1/articles/contributors/contrib.additional.sgml b/en_US.ISO8859-1/articles/contributors/contrib.additional.sgml
index 520ef3767f..eee680b3c2 100644
--- a/en_US.ISO8859-1/articles/contributors/contrib.additional.sgml
+++ b/en_US.ISO8859-1/articles/contributors/contrib.additional.sgml
@@ -4946,6 +4946,11 @@
 	<email>kot@premierbank.dp.ua</email></para>
     </listitem>
 
+    <listitem>
+      <para>Konstantinos Mplekos
+	<email>mplekos@physics.upatras.gr</email></para>
+    </listitem>
+
     <listitem>
       <para>Kostya Lukin
 	<email>lukin@okbmei.msk.su</email></para>