diff --git a/Doc/ACKS b/Doc/ACKS
index 3f07066..2c89e2a 100644
--- a/Doc/ACKS
+++ b/Doc/ACKS
@@ -164,6 +164,7 @@
 Justin Sheehy
 Michael Simcich
 Ionel Simionescu
+Gregory P. Smith
 Roy Smith
 Clay Spence
 Nicholas Spies