Add credit for r88682.
diff --git a/Misc/ACKS b/Misc/ACKS
index 8066ebc..f2b15d3 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -326,6 +326,7 @@
 Fabian Groffen
 Eric Groo
 Dag Gruneau
+Filip GruszczyƄski
 Michael Guravage
 Lars Gustäbel
 Thomas Güttler