diff --git a/tools/power-utils/updater.hpp b/tools/power-utils/updater.hpp
new file mode 100644
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+++ b/tools/power-utils/updater.hpp
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+/**
+ * Copyright © 2019 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.
+ */
+#pragma once
+
+#include <string>
+
+namespace updater
+{
+
+/**
+ * Update PSU firmware
+ *
+ * @param[in] psuInventoryPath - The inventory path of the PSU
+ * @param[in] imageDir - The directory containing the PSU image
+ *
+ * @return true if successful, otherwise false
+ */
+bool update(const std::string& psuInventoryPath, const std::string& imageDir);
+
+} // namespace updater