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diff --git a/src/mongo/base/concept/clonable.h b/src/mongo/base/concept/clonable.h
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+/*-
+ *    Copyright (C) 2016 MongoDB Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects
+ *    for all of the code used other than as permitted herein. If you modify
+ *    file(s) with this exception, you may extend this exception to your
+ *    version of the file(s), but you are not obligated to do so. If you do not
+ *    wish to do so, delete this exception statement from your version. If you
+ *    delete this exception statement from all source files in the program,
+ *    then also delete it in the license file.
+ */
+#pragma once
+
+#include "mongo/base/concept/constructible.h"
+#include "mongo/base/concept/unique_ptr.h"
+
+namespace mongo {
+namespace concept {
+/*!
+ * Objects conforming to the Clonable concept can be dynamically copied, using `this->clone()`.
+ * The Clonable concept does not specify the return type of the `clone()` function.
+ */
+struct Clonable {
+    /*! Clonable objects must be safe to destroy, by pointer. */
+    virtual ~Clonable() noexcept = 0;
+
+    /*! Clonable objects can be cloned without knowing the actual dynamic type. */
+    Constructible<UniquePtr<Clonable>> clone() const;
+};
+}  // namespace concept
+}  // namespace mongo