diff --git a/libs/gtkmm2ext/dndtreeview.cc b/libs/gtkmm2ext/dndtreeview.cc
index fa75528c73..5854d72696 100644
--- a/libs/gtkmm2ext/dndtreeview.cc
+++ b/libs/gtkmm2ext/dndtreeview.cc
@@ -124,9 +124,9 @@ DnDTreeViewBase::add_drop_targets (list<TargetEntry>& targets)
 }
 
 void
-DnDTreeViewBase::add_object_drag (int column, string type_name)
+DnDTreeViewBase::add_object_drag (int column, string type_name, TargetFlags flags)
 {
-	draggable.push_back (TargetEntry (type_name, TargetFlags(0)));
+	draggable.push_back (TargetEntry (type_name, flags));
 	data_column = column;
 	object_type = type_name;
 
diff --git a/libs/gtkmm2ext/gtkmm2ext/dndtreeview.h b/libs/gtkmm2ext/gtkmm2ext/dndtreeview.h
index 896ee93846..b4f234d316 100644
--- a/libs/gtkmm2ext/gtkmm2ext/dndtreeview.h
+++ b/libs/gtkmm2ext/gtkmm2ext/dndtreeview.h
@@ -66,7 +66,7 @@ class LIBGTKMM2EXT_API DnDTreeViewBase : public Gtk::TreeView
 	sigc::signal4<bool, const Glib::RefPtr<Gdk::DragContext>&, int, int, guint, BoolAccumulator> signal_motion;
 
 	void add_drop_targets (std::list<Gtk::TargetEntry>&);
-	void add_object_drag (int column, std::string type_name);
+	void add_object_drag (int column, std::string type_name, Gtk::TargetFlags flags = Gtk::TargetFlags (0));
 
 	void on_drag_begin (Glib::RefPtr<Gdk::DragContext> const & context);
 	void on_drag_end (Glib::RefPtr<Gdk::DragContext> const & context);