diff --git a/Misc/ACKS b/Misc/ACKS
index 58dd0ad..b2528f7 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -302,6 +302,7 @@
 Orjan Johansen
 Simon Johnston
 Richard Jones
+Irmen de Jong
 Lucas de Jonge
 Jens B. Jorgensen
 John Jorgensen