diff --git a/prologue/acknowledgments.xml b/prologue/acknowledgments.xml
index b66ecbc37..c500f3dc7 100644
--- a/prologue/acknowledgments.xml
+++ b/prologue/acknowledgments.xml
@@ -173,8 +173,8 @@ mirror.</para></listitem>
 Esparcia</ulink> &lt;manuel@linuxfromscratch.org&gt; -- lfsmirror.lfs-es.org
 mirror.</para></listitem>
 
-<listitem><para><ulink url="mailto:unknown@unknowm.org">Unknown User</ulink>
-&lt;unknown@unknown.org&gt; -- lfs.mesi.com.ar mirror.</para></listitem>
+<listitem><para><ulink url="mailto:sysop@mesi.com.ar">Andres Meggiotto</ulink>
+&lt;sysop@mesi.com.ar&gt; -- lfs.mesi.com.ar mirror.</para></listitem>
 
 <listitem><para><ulink url="mailto:ebf@aedsolucoes.com.br">Eduardo B.
 Fonseca</ulink> &lt;ebf@aedsolucoes.com.br&gt; -- br.linuxfromscratch.org