Credit Per Øyvind Karlsen for the initial implementation of the lzma module (issue #6715).
diff --git a/Misc/ACKS b/Misc/ACKS
index 70a42e2..37835af 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -502,6 +502,7 @@
 Peter van Kampen
 Rafe Kaplan
 Jacob Kaplan-Moss
+Per Øyvind Karlsen
 Lou Kates
 Hiroaki Kawai
 Sebastien Keim