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diff --git a/libs/ardour/ardour/record_enable_control.h b/libs/ardour/ardour/record_enable_control.h
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+++ b/libs/ardour/ardour/record_enable_control.h
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+/*
+    Copyright (C) 2016 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by the Free
+    Software Foundation; either version 2 of the License, or (at your option)
+    any later version.
+
+    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 General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __ardour_record_enable_control_h__
+#define __ardour_record_enable_control_h__
+
+#include <string>
+
+#include <boost/shared_ptr.hpp>
+#include <boost/dynamic_bitset.hpp>
+
+#include "ardour/automation_control.h"
+#include "ardour/recordable.h"
+
+#include "ardour/libardour_visibility.h"
+
+namespace ARDOUR {
+
+class Session;
+
+class LIBARDOUR_API RecordEnableControl : public SlavableAutomationControl
+{
+  public:
+	RecordEnableControl (Session& session, std::string const & name, Recordable& m);
+	~RecordEnableControl() {}
+
+	/* Most (Slavable)AutomationControls do not override this, but we need
+	 * to in order to prepare the Recordable for a change that will happen
+	 * subsequently, in a realtime context. So the change is divided into
+	 * two parts: the non-RT preparation, executed inside ::set_value(),
+	 * then the second RT part.
+	 */
+
+	void set_value (double, PBD::Controllable::GroupControlDisposition);
+
+  protected:
+	void actually_set_value (double val, Controllable::GroupControlDisposition gcd);
+
+  private:
+	Recordable& _recordable;
+};
+
+} /* namespace */
+
+#endif /* __libardour_record_enable_control_h__ */