diff --git a/Misc/ACKS b/Misc/ACKS
index e47d738..ce64e20 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -988,6 +988,7 @@
 Sandro Tosi
 Richard Townsend
 Laurence Tratt
+Matthias Troffaes
 John Tromp
 Jason Trowbridge
 Anthony Tuininga