diff --git a/src/main/java/org/opencord/igmpproxy/IgmpSender.java b/src/main/java/org/opencord/igmpproxy/IgmpSender.java
index 21db478..af0d1b6 100644
--- a/src/main/java/org/opencord/igmpproxy/IgmpSender.java
+++ b/src/main/java/org/opencord/igmpproxy/IgmpSender.java
@@ -1,3 +1,18 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * Licensed 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.
+ */
 package org.opencord.igmpproxy;
 
 import org.onlab.packet.Ethernet;