diff --git a/lib/package_alternatives.c b/lib/package_alternatives.c
index b981638c..cb6ddee0 100644
--- a/lib/package_alternatives.c
+++ b/lib/package_alternatives.c
@@ -1,5 +1,6 @@
 /*-
- * Copyright (c) 2015 Juan Romero Pardines.
+ * Copyright (c) 2015-2019 Juan Romero Pardines.
+ * Copyright (c) 2019 Duncan Overbruck.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without