diff --git a/src/seeder/CMakeLists.txt b/src/seeder/CMakeLists.txt
--- a/src/seeder/CMakeLists.txt
+++ b/src/seeder/CMakeLists.txt
@@ -1,4 +1,6 @@
-# Copyright (c) 2017 The Bitcoin developers
+# Copyright (c) 2017-2019 The Bitcoin developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 project(bitcoin-seeder)
 
diff --git a/src/seeder/bitcoin.h b/src/seeder/bitcoin.h
--- a/src/seeder/bitcoin.h
+++ b/src/seeder/bitcoin.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_SEEDER_BITCOIN_H
 #define BITCOIN_SEEDER_BITCOIN_H
 
diff --git a/src/seeder/bitcoin.cpp b/src/seeder/bitcoin.cpp
--- a/src/seeder/bitcoin.cpp
+++ b/src/seeder/bitcoin.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <seeder/bitcoin.h>
 
 #include <hash.h>
diff --git a/src/seeder/db.h b/src/seeder/db.h
--- a/src/seeder/db.h
+++ b/src/seeder/db.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_SEEDER_DB_H
 #define BITCOIN_SEEDER_DB_H
 
diff --git a/src/seeder/db.cpp b/src/seeder/db.cpp
--- a/src/seeder/db.cpp
+++ b/src/seeder/db.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <seeder/db.h>
 
 #include <cstdlib>
diff --git a/src/seeder/dns.h b/src/seeder/dns.h
--- a/src/seeder/dns.h
+++ b/src/seeder/dns.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_SEEDER_DNS_H
 #define BITCOIN_SEEDER_DNS_H 1
 
diff --git a/src/seeder/dns.cpp b/src/seeder/dns.cpp
--- a/src/seeder/dns.cpp
+++ b/src/seeder/dns.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <seeder/dns.h>
 
 #include <arpa/inet.h>
diff --git a/src/seeder/main.cpp b/src/seeder/main.cpp
--- a/src/seeder/main.cpp
+++ b/src/seeder/main.cpp
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #include <clientversion.h>
 #include <fs.h>
 #include <logging.h>
diff --git a/src/seeder/util.h b/src/seeder/util.h
--- a/src/seeder/util.h
+++ b/src/seeder/util.h
@@ -1,3 +1,7 @@
+// Copyright (c) 2017-2019 The Bitcoin developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
 #ifndef BITCOIN_SEEDER_UTIL_H
 #define BITCOIN_SEEDER_UTIL_H