diff --git a/module/zfs/dsl_scan.c b/module/zfs/dsl_scan.c
index 712af664e9..0ebda2f770 100644
--- a/module/zfs/dsl_scan.c
+++ b/module/zfs/dsl_scan.c
@@ -23,6 +23,7 @@
  * Copyright (c) 2011, 2018 by Delphix. All rights reserved.
  * Copyright 2016 Gary Mills
  * Copyright (c) 2017, 2019, Datto Inc. All rights reserved.
+ * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved.
  * Copyright 2019 Joyent, Inc.
  */
 
diff --git a/module/zfs/metaslab.c b/module/zfs/metaslab.c
index ccc247d155..133005b227 100644
--- a/module/zfs/metaslab.c
+++ b/module/zfs/metaslab.c
@@ -22,6 +22,7 @@
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  * Copyright (c) 2011, 2019 by Delphix. All rights reserved.
  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
+ * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved.
  * Copyright (c) 2017, Intel Corporation.
  */
 
diff --git a/module/zfs/range_tree.c b/module/zfs/range_tree.c
index 2c0e4b860a..2ce0139c91 100644
--- a/module/zfs/range_tree.c
+++ b/module/zfs/range_tree.c
@@ -24,6 +24,7 @@
  */
 /*
  * Copyright (c) 2013, 2019 by Delphix. All rights reserved.
+ * Copyright (c) 2015, Nexenta Systems, Inc. All rights reserved.
  */
 
 #include <sys/zfs_context.h>