diff --git a/Doc/ACKS b/Doc/ACKS
index 7f19f23..e5d6297 100644
--- a/Doc/ACKS
+++ b/Doc/ACKS
@@ -130,6 +130,7 @@
 Dale Nagata
 Ng Pheng Siong
 Koray Oner
+Tomas Oppelstrup
 Denis S. Otkidach
 Zooko O'Whielacronx
 William Park