diff --git a/lib/hs/src/TServer.hs b/lib/hs/src/TServer.hs
index 4676fc1..bce29ba 100644
--- a/lib/hs/src/TServer.hs
+++ b/lib/hs/src/TServer.hs
@@ -1,3 +1,22 @@
+--
+-- Licensed to the Apache Software Foundation (ASF) under one
+-- or more contributor license agreements. See the NOTICE file
+-- distributed with this work for additional information
+-- regarding copyright ownership. The ASF licenses this file
+-- to you under the Apache License, Version 2.0 (the
+-- "License"); you may not use this file except in compliance
+-- with the License. You may obtain a copy of the License at
+--
+--   http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing,
+-- software distributed under the License is distributed on an
+-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+-- KIND, either express or implied. See the License for the
+-- specific language governing permissions and limitations
+-- under the License.
+--
+
 module TServer(run_basic_server,run_threaded_server) where
 
 import Network