diff --git a/Misc/ACKS b/Misc/ACKS
index 4aa9026ddf6..07aef569032 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -414,6 +414,7 @@ Noah Spurrier
 Greg Stein
 Dan Stromberg
 Nathan Sullivan
+Mark Summerfield
 Kalle Svensson
 Hajime Saitou
 RajGopal Srinivasan