diff --git a/.mailmap b/.mailmap
index 337e855f16..76f6ccb896 100644
--- a/.mailmap
+++ b/.mailmap
@@ -17,6 +17,7 @@ Fridolin Somers                 <fridolyn.somers@biblibre.com>
 Galen Charlton                  <gmc@esilibrary.com>
 Greg Barniskis                  <gbarniskis@gmail.com>
 Ian Walls                       <ian.walls@bywatersolutions.com>
+Holger Meißner                  <h.meissner.82@web.de>
 Janusz Kaczmarek                <januszop@gmail.com>
 Jared Camins-Esakov             <jcamins@cpbibliography.com>
 Jonathan Druart                 <jonathan.druart@biblibre.com>
@@ -52,12 +53,13 @@ Fridolin Somers                 Fridolyn SOMERS
 
 # Mail to mail mapping: the email addy in the right column will be mapped to the email addy in the left
 
-<cnighswonger@foundations.edu>  <chris.nighswonger@gmail.com>
-<frederick.capovilla@libeo.com> <fredericiapovilla@sys-tech.net>
-<katrin.fischer@bsz-bw.de>      <Katrin.Fischer.83@web.de>
-<jcamins@cpbibliography.com>    <jcamins@bywatersolutions.com>
-<jcamins@cpbibliography.com>    <camins@numismatics.org>
-<jcamins@cpbibliography.com>    <koha@cpbibliography.com>
-<tcohen@psi.unc.edu.ar>         <tomascohen@gmail.com>
-<gonzalez@di.unc.edu.ar>        <bgkriegel@gmail.com>
-<fridolin.somers@biblibre.com>  <fridolyn.somers@biblibre.com>
+<cnighswonger@foundations.edu>     <chris.nighswonger@gmail.com>
+<frederick.capovilla@libeo.com>    <fredericiapovilla@sys-tech.net>
+<fridolin.somers@biblibre.com>     <fridolyn.somers@biblibre.com>
+<gonzalez@di.unc.edu.ar>           <bgkriegel@gmail.com>
+<holger.meissner@hs-gesundheit.de> <h.meissner.82@web.de>
+<jcamins@cpbibliography.com>       <jcamins@bywatersolutions.com>
+<jcamins@cpbibliography.com>       <camins@numismatics.org>
+<jcamins@cpbibliography.com>       <koha@cpbibliography.com>
+<katrin.fischer@bsz-bw.de>         <Katrin.Fischer.83@web.de>
+<tcohen@psi.unc.edu.ar>            <tomascohen@gmail.com>