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diff --git a/src/mongo/scripting/mozjs/jsthread.h b/src/mongo/scripting/mozjs/jsthread.h
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+/**
+ * Copyright (C) 2015 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/scripting/mozjs/wraptype.h"
+
+namespace mongo {
+namespace mozjs {
+
+/**
+ * Helper for the JSThread javascript object
+ *
+ * The workflow is strange because we have a thing in javascript called a
+ * JSThread, but we don't actually get to construct it. Instead, we have to
+ * inject methods into that thing (via _threadInject) and hang our C++ thread
+ * separately (via init() on that type).
+ *
+ * To manage lifetime, we just add a field into the injected object that's our
+ * JSThread and add our holder in as our JSThread's private member.
+ */
+struct JSThreadInfo : public BaseInfo {
+    static void finalize(JSFreeOp* fop, JSObject* obj);
+
+    struct Functions {
+        MONGO_DEFINE_JS_FUNCTION(init);
+        MONGO_DEFINE_JS_FUNCTION(start);
+        MONGO_DEFINE_JS_FUNCTION(join);
+        MONGO_DEFINE_JS_FUNCTION(hasFailed);
+        MONGO_DEFINE_JS_FUNCTION(returnData);
+
+        MONGO_DEFINE_JS_FUNCTION(_threadInject);
+        MONGO_DEFINE_JS_FUNCTION(_scopedThreadInject);
+    };
+
+    /**
+     * Note that this isn't meant to supply methods for JSThread, it's just
+     * there to work with _threadInject. So the name isn't a mistake
+     */
+    static const JSFunctionSpec threadMethods[6];
+    static const JSFunctionSpec freeFunctions[3];
+
+    static const char* const className;
+    static const unsigned classFlags = JSCLASS_HAS_PRIVATE;
+    static const InstallType installType = InstallType::Private;
+};
+
+}  // namespace mozjs
+}  // namespace mongo