diff --git a/.mailmap b/.mailmap
index f5147dd040..d13219ab03 100644
--- a/.mailmap
+++ b/.mailmap
@@ -16,7 +16,8 @@
 <jmckenty@gmail.com> <jmckenty@joshua-mckentys-macbook-pro.local>
 <jmckenty@gmail.com> <joshua.mckenty@nasa.gov>
 <justin@fathomdb.com> <justinsb@justinsb-desktop>
-<masumotok@nttdata.co.jp> <root@openstack2-api> <masumotok@nttdata.co.jp> Masumoto<masumotok@nttdata.co.jp>
+<masumotok@nttdata.co.jp> <root@openstack2-api>
+<masumotok@nttdata.co.jp> Masumoto<masumotok@nttdata.co.jp>
 <mordred@inaugust.com> <mordred@hudson>
 <paul@openstack.org> <pvoccio@castor.local>
 <paul@openstack.org> <paul.voccio@rackspace.com>