diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 746c60b900..98c9869706 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -86,6 +86,7 @@ Brian Dellisanti <briandellisanti@gmail.com>
 Brian Slesinsky <skybrian@google.com>
 Brendan O'Dea <bod@golang.org>
 Caine Tighe <arctanofyourface@gmail.com>
+Carl Mastrangelo <notcarl@google.com>
 Carlos Castillo <cookieo9@gmail.com>
 Cary Hull <chull@google.com>
 Charles L. Dorian <cldorian@gmail.com>