diff --git a/Misc/ACKS b/Misc/ACKS
index 3686b6a573d..359e969af60 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -463,6 +463,7 @@ Paul ten Hagen
 Rasmus Hahn
 Peter Haight
 Václav Haisman
+Zbigniew Halas
 Walker Hale IV
 Bob Halley
 Jesse Hallio