diff --git a/include/in_mem_filter_store.h b/include/in_mem_filter_store.h
index f1bedba62..7080ef665 100644
--- a/include/in_mem_filter_store.h
+++ b/include/in_mem_filter_store.h
@@ -1,4 +1,8 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
 #pragma once
+
 #include <vector>
 #include <sstream>
 #include <memory>
diff --git a/include/index_config.h b/include/index_config.h
index a7100edfa..dde4ec51d 100644
--- a/include/index_config.h
+++ b/include/index_config.h
@@ -1,3 +1,6 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license.
+
 #pragma once
 
 #include <memory>