diff --git a/include/overlay.hpp b/include/overlay.hpp
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--- /dev/null
+++ b/include/overlay.hpp
@@ -0,0 +1,22 @@
+/*
+// Copyright (c) 2018 Intel 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.
+*/
+/// \file overlay.hpp
+
+#pragma once
+#include <nlohmann/json.hpp>
+
+void unloadAllOverlays(void);
+bool loadOverlays(const nlohmann::json& systemConfiguration);
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