1 files changed, 6 insertions, 0 deletions
diff --git a/FL/Fl.H b/FL/Fl.H
index 92e97788d..c8552884b 100644
--- a/FL/Fl.H
+++ b/FL/Fl.H
@@ -1598,6 +1598,12 @@ class FL_EXPORT Fl_Widget_Tracker {
 public:
 
   Fl_Widget_Tracker(Fl_Widget *wi);
+  // Rule of five. Note that we *can* implement these when we refactor widget
+  // tracking with a C++11 map or unordered_map, for example.
+  Fl_Widget_Tracker(const Fl_Widget_Tracker&) = delete;
+  Fl_Widget_Tracker(Fl_Widget_Tracker&&) = delete;
+  Fl_Widget_Tracker& operator=(const Fl_Widget_Tracker&) = delete;
+  Fl_Widget_Tracker& operator=(Fl_Widget_Tracker&&) = delete;
   ~Fl_Widget_Tracker();
 
   /**