diff --git a/Misc/ACKS b/Misc/ACKS
index 3326096..ebe6770 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -319,6 +319,7 @@
 Bernhard Reiter
 Steven Reiz
 Jan Pieter Riegel
+Armin Rigo
 Nicholas Riley
 Jean-Claude Rimbault
 Andy Robinson