diff --git a/crypto/shamir.c b/crypto/shamir.c
index 6e25700a5..b825dad23 100644
--- a/crypto/shamir.c
+++ b/crypto/shamir.c
@@ -2,6 +2,7 @@
  * Implementation of the hazardous parts of the SSS library
  *
  * Copyright (c) 2017 Daan Sprenkels <hello@dsprenkels.com>
+ * Copyright (c) 2019 SatoshiLabs
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the "Software"),
diff --git a/crypto/shamir.h b/crypto/shamir.h
index 2a4242301..ef04a3063 100644
--- a/crypto/shamir.h
+++ b/crypto/shamir.h
@@ -1,6 +1,7 @@
 /*
  * Low level API for Daan Sprenkels' Shamir secret sharing library
  * Copyright (c) 2017 Daan Sprenkels <hello@dsprenkels.com>
+ * Copyright (c) 2019 SatoshiLabs
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the "Software"),