diff --git a/.mailmap b/.mailmap
index e11fb6d2b6..068b4f6986 100644
--- a/.mailmap
+++ b/.mailmap
@@ -25,6 +25,7 @@ Liz Rea                         <lrea@nekls.org>
 MJ Ray                          <mjr@phonecoop.coop>
 Magnus Enger                    <magnus@enger.priv.no>
 Marcel de Rooy                  <m.de.rooy@rijksmuseum.nl>
+Marcel de Rooy                  <marcel@libdevelop.rijksmuseum.nl>
 Mason James                     <mtj@kohaaloha.com>
 Matthias Meusburger             <matthias.meusburger@biblibre.com>
 Maxime Pelletier                <maxime.pelletier@libeo.com>