diff --git a/clutter/clutter/clutter-pick-stack.c b/clutter/clutter/clutter-pick-stack.c
index 5a2260a8e..2a18fa3d3 100644
--- a/clutter/clutter/clutter-pick-stack.c
+++ b/clutter/clutter/clutter-pick-stack.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2020 Endless OS Foundation, LLC
+ * Copyright (C) 2018 Canonical Ltd.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public