diff --git a/Doc/ACKS b/Doc/ACKS
index 6f791be9bb0..60ed2ad6e1d 100644
--- a/Doc/ACKS
+++ b/Doc/ACKS
@@ -44,6 +44,7 @@ Matthew Cowles
 Jeremy Craven
 Andrew Dalke
 Ben Darnell
+L. Peter Deutsch
 Robert Donohue
 Fred L. Drake, Jr.
 Jeff Epler