diff --git a/AUTHORS b/AUTHORS
index 4c6335fb85..4b10f9315d 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -206,6 +206,7 @@ Mateusz Czapliński <czapkofan@gmail.com>
 Mathieu Lonjaret <mathieu.lonjaret@gmail.com>
 Mats Lidell <mats.lidell@cag.se>
 Matt Jibson <matt.jibson@gmail.com>
+Matt Joiner <anacrolix@gmail.com>
 Matthew Horsnell <matthew.horsnell@gmail.com>
 Micah Stetson <micah.stetson@gmail.com>
 Michael Chaten <mchaten@gmail.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index f8e64c3250..1071fdd4d0 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -304,6 +304,7 @@ Mathieu Lonjaret <mathieu.lonjaret@gmail.com>
 Mats Lidell <mats.lidell@cag.se> <mats.lidell@gmail.com>
 Matt Brown <mdbrown@google.com>
 Matt Jibson <matt.jibson@gmail.com>
+Matt Joiner <anacrolix@gmail.com>
 Matt Jones <mrjones@google.com>
 Matthew Dempsky <mdempsky@google.com>
 Matthew Horsnell <matthew.horsnell@gmail.com>