diff --git a/libs/ctrl-interface/control_protocol/control_protocol.cc b/libs/ctrl-interface/control_protocol/control_protocol.cc
index 93dc37ce75..28c068c0fd 100644
--- a/libs/ctrl-interface/control_protocol/control_protocol.cc
+++ b/libs/ctrl-interface/control_protocol/control_protocol.cc
@@ -56,6 +56,7 @@ PBD::Signal0<void> ControlProtocol::VerticalZoomInSelected;
 PBD::Signal0<void> ControlProtocol::VerticalZoomOutSelected;
 PBD::Signal0<void>          ControlProtocol::StepTracksDown;
 PBD::Signal0<void>          ControlProtocol::StepTracksUp;
+PBD::Signal1<void,std::weak_ptr<PluginInsert> > ControlProtocol::PluginSelected;
 
 StripableNotificationList ControlProtocol::_last_selected;
 PBD::ScopedConnection ControlProtocol::selection_connection;
diff --git a/libs/ctrl-interface/control_protocol/control_protocol/control_protocol.h b/libs/ctrl-interface/control_protocol/control_protocol/control_protocol.h
index 6c1db91cc9..55ca8b42df 100644
--- a/libs/ctrl-interface/control_protocol/control_protocol/control_protocol.h
+++ b/libs/ctrl-interface/control_protocol/control_protocol/control_protocol.h
@@ -27,7 +27,6 @@
 #include <string>
 #include <vector>
 
-
 #include "pbd/signals.h"
 #include "pbd/stateful.h"
 #include "pbd/glib_event_source.h"
@@ -42,6 +41,7 @@ class Route;
 class Session;
 class Bundle;
 class Stripable;
+class PluginInsert;
 
 class LIBCONTROLCP_API ControlProtocol : public PBD::Stateful, public PBD::ScopedConnectionList, public BasicUI
 {
@@ -82,6 +82,7 @@ public:
 	static PBD::Signal0<void> VerticalZoomOutSelected;
 	static PBD::Signal0<void> StepTracksDown;
 	static PBD::Signal0<void> StepTracksUp;
+	static PBD::Signal1<void, std::weak_ptr<ARDOUR::PluginInsert> > PluginSelected;
 
 	void add_stripable_to_selection (std::shared_ptr<ARDOUR::Stripable>);
 	void set_stripable_selection (std::shared_ptr<ARDOUR::Stripable>);