diff --git a/btcec/curve.go b/btcec/curve.go
index b86c591374..5224e35c8e 100644
--- a/btcec/curve.go
+++ b/btcec/curve.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2015-2021 The btcsuite developers
+// Copyright (c) 2015-2021 The Decred developers
+
 package btcec
 
 import (
diff --git a/btcec/error.go b/btcec/error.go
index 39c9172bc3..81ca2b044d 100644
--- a/btcec/error.go
+++ b/btcec/error.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2013-2021 The btcsuite developers
+// Copyright (c) 2015-2021 The Decred developers
+
 package btcec
 
 import (
diff --git a/btcec/modnscalar.go b/btcec/modnscalar.go
index eb1b8f05f4..b18b2c1d43 100644
--- a/btcec/modnscalar.go
+++ b/btcec/modnscalar.go
@@ -1,3 +1,6 @@
+// Copyright (c) 2013-2021 The btcsuite developers
+// Copyright (c) 2015-2021 The Decred developers
+
 package btcec
 
 import (