diff --git a/.mailmap b/.mailmap
index 5c7df7c9b0..bed8e9b388 100644
--- a/.mailmap
+++ b/.mailmap
@@ -6,3 +6,5 @@ Jiajun Liu <jiajun@unitedstack.com> <iamljj@gmail.com>
 Zhongyue Luo <zhongyue.nah@intel.com> <lzyeval@gmail.com>
 Kun Huang <gareth@unitedstack.com> <academicgareth@gmail.com>
 Zhenguo Niu <zhenguo@unitedstack.com> <Niu.ZGlinux@gmail.com>
+Isaku Yamahata <isaku.yamahata@intel.com> <isaku.yamahata@gmail.com>
+Isaku Yamahata <isaku.yamahata@intel.com> <yamahata@private.email.ne.jp>