diff --git a/share/sgml/developers.ent b/share/sgml/developers.ent
index f099a887c5..7f0a6357b3 100644
--- a/share/sgml/developers.ent
+++ b/share/sgml/developers.ent
@@ -418,6 +418,7 @@ $FreeBSD$
 <!ENTITY a.mita "Yoshio MITA">
 <!ENTITY a.miwi "Martin Wilke">
 <!ENTITY a.mjacob "Matthew Jacob">
+<!ENTITY a.mjg "Mateusz Guzik">
 <!ENTITY a.mks "Mike Spengler">
 <!ENTITY a.mlaier "Max Laier">
 <!ENTITY a.mm "Martin Matuska">