Index: head/share/xml/authors.ent
===================================================================
--- head/share/xml/authors.ent
+++ head/share/xml/authors.ent
@@ -18,6 +18,9 @@
 
 <!-- FreeBSD Committers -->
 
+<!ENTITY a.0mp "Mateusz Piotrowski">
+<!ENTITY a.0mp.email "&a.0mp; <email xmlns='http://docbook.org/ns/docbook'>0mp@FreeBSD.org</email>">
+
 <!ENTITY a.aaron "Aaron Dalton">
 <!ENTITY a.aaron.email "&a.aaron; <email xmlns='http://docbook.org/ns/docbook'>aaron@FreeBSD.org</email>">