diff --git a/tach_sensor.cpp b/tach_sensor.cpp
index 91e249d..c21478b 100644
--- a/tach_sensor.cpp
+++ b/tach_sensor.cpp
@@ -1,3 +1,18 @@
+/**
+ * Copyright © 2017 IBM Corporation
+ *
+ * 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.
+ */
 #include <sdbusplus/exception.hpp>
 #include "tach_sensor.hpp"
 #include "fan_enclosure.hpp"