diff --git a/.mailmap b/.mailmap
index be2b1628aa..295837ff3b 100644
--- a/.mailmap
+++ b/.mailmap
@@ -8,6 +8,7 @@ Jens Axel Soegaard  <soegaard@racket-lang.org>    <jensaxel@soegaard.net>
 Matthew Flatt       <mflatt@racket-lang.org>      <mflatt@cs.utah.edu>
 Matthew Flatt       <mflatt@racket-lang.org>      <mflatt@debian.cs.utah.edu>
 Matthew Flatt       <mflatt@racket-lang.org>      <mflatt@mflatt-laptop.(none)>
+Matthew Flatt       <mflatt@racket-lang.org>      <mflatt@mflatt-VirtualBox.(none)>
 Kathy Gray          <kathyg@racket-lang.org>      <kathryn.gray@cl.cam.ac.uk>
 Kathy Gray          <kathyg@racket-lang.org>      <kathyg@c0133.aw.cl.cam.ac.uk>
 Matthias Felleisen  <matthias@racket-lang.org>    <matthias@ccs.neu.edu>