diff --git a/Misc/ACKS b/Misc/ACKS
index b717a36..42fa409 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -552,6 +552,7 @@
 Nathan Paul Simons
 Janne Sinkkonen
 George Sipe
+J. Sipprell
 Kragen Sitaker
 Christopher Smith
 Gregory P. Smith