Index: mscore/mscore/undo.h =================================================================== --- mscore/mscore/undo.h (revision 1937) +++ mscore/mscore/undo.h (working copy) @@ -69,7 +69,7 @@ QList childList; public: - ~UndoCommand(); + virtual ~UndoCommand(); virtual void undo(); virtual void redo(); void appendChild(UndoCommand* cmd) { childList.append(cmd); }