diff --git a/gtk2_ardour/port_insert_ui.cc b/gtk2_ardour/port_insert_ui.cc
index 99772003af..0b22f83d2a 100644
--- a/gtk2_ardour/port_insert_ui.cc
+++ b/gtk2_ardour/port_insert_ui.cc
@@ -339,4 +339,15 @@ PortInsertWindow::PortInsertWindow (Gtk::Window& parent, ARDOUR::Session* s, std
 {
 	set_name ("IOSelectorWindow");
 	add (_portinsertui);
+	_portinsertui.show ();
+}
+
+
+PortInsertWindow::PortInsertWindow (ARDOUR::Session* s, std::shared_ptr<ARDOUR::PortInsert> pi)
+	: ArdourWindow (string_compose (_("Port Insert: %1"), pi->name ()))
+	, _portinsertui (this, s, pi)
+{
+	set_name ("IOSelectorWindow");
+	add (_portinsertui);
+	_portinsertui.show ();
 }
diff --git a/gtk2_ardour/port_insert_ui.h b/gtk2_ardour/port_insert_ui.h
index 94aa08e41b..6538b7015b 100644
--- a/gtk2_ardour/port_insert_ui.h
+++ b/gtk2_ardour/port_insert_ui.h
@@ -91,6 +91,7 @@ class PortInsertWindow : public ArdourWindow
 {
 public:
 	PortInsertWindow (Gtk::Window&, ARDOUR::Session*, std::shared_ptr<ARDOUR::PortInsert>);
+	PortInsertWindow (ARDOUR::Session*, std::shared_ptr<ARDOUR::PortInsert>);
 
 private:
 	PortInsertUI _portinsertui;
diff --git a/gtk2_ardour/processor_box.cc b/gtk2_ardour/processor_box.cc
index fd741cd1aa..a4bcf1906b 100644
--- a/gtk2_ardour/processor_box.cc
+++ b/gtk2_ardour/processor_box.cc
@@ -3984,8 +3984,11 @@ ProcessorBox::get_editor_window (std::shared_ptr<Processor> processor, bool use_
 
 		if (std::dynamic_pointer_cast<InternalSend> (processor) == 0) {
 			Gtk::Window* tlw = dynamic_cast<Gtk::Window*> (get_toplevel ());
-			assert (tlw);
-			gidget = new SendUIWindow (*tlw, _session, send);
+			if (tlw) {
+				gidget = new SendUIWindow (*tlw, _session, send);
+			} else {
+				gidget = new SendUIWindow (_session, send);
+			}
 		}
 
 	} else if ((retrn = std::dynamic_pointer_cast<Return> (processor)) != 0) {
@@ -4047,8 +4050,11 @@ ProcessorBox::get_editor_window (std::shared_ptr<Processor> processor, bool use_
 
 		if (w == 0) {
 			Gtk::Window* tlw = dynamic_cast<Gtk::Window*> (get_toplevel ());
-			assert (tlw);
-			io_selector = new PortInsertWindow (*tlw, _session, port_insert);
+			if (tlw) {
+				io_selector = new PortInsertWindow (*tlw, _session, port_insert);
+			} else {
+				io_selector = new PortInsertWindow (_session, port_insert);
+			}
 			set_processor_ui (port_insert, io_selector);
 
 		} else {
diff --git a/gtk2_ardour/send_ui.cc b/gtk2_ardour/send_ui.cc
index 194e67d33f..7448188179 100644
--- a/gtk2_ardour/send_ui.cc
+++ b/gtk2_ardour/send_ui.cc
@@ -159,3 +159,12 @@ SendUIWindow::SendUIWindow (Gtk::Window& parent, ARDOUR::Session* session, std::
 	add (_ui);
 	_ui.show ();
 }
+
+SendUIWindow::SendUIWindow (ARDOUR::Session* session, std::shared_ptr<Send> send)
+	: ArdourWindow (string_compose (_("Send: %1"), send->name ()))
+	, _ui (this, session, send)
+{
+	set_name ("SendUIWindow");
+	add (_ui);
+	_ui.show ();
+}
diff --git a/gtk2_ardour/send_ui.h b/gtk2_ardour/send_ui.h
index 7fbf6b9acd..bf29179c84 100644
--- a/gtk2_ardour/send_ui.h
+++ b/gtk2_ardour/send_ui.h
@@ -65,6 +65,7 @@ class SendUIWindow : public ArdourWindow
 {
 public:
 	SendUIWindow (Gtk::Window&, ARDOUR::Session*, std::shared_ptr<ARDOUR::Send>);
+	SendUIWindow (ARDOUR::Session*, std::shared_ptr<ARDOUR::Send>);
 
 private:
 	SendUI _ui;