diff --git a/Misc/ACKS b/Misc/ACKS
index 972d35e..3de0f3b 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -58,6 +58,7 @@
 Donn Cave
 Per Cederqvist
 Jeffrey Chang
+Brad Chapman
 Mitch Chapman
 David Chaum
 Nicolas Chauvat