-EditGuideCommand::EditGuideCommand(CustomTrackView *view, const GenTime oldPos, const QString &oldcomment, const GenTime pos, const QString &comment, bool doIt) : m_view(view), m_oldPos(oldPos), m_oldcomment(oldcomment), m_pos(pos), m_comment(comment), m_doIt(doIt) {
+EditGuideCommand::EditGuideCommand(CustomTrackView *view, const GenTime oldPos, const QString &oldcomment, const GenTime pos, const QString &comment, bool doIt, QUndoCommand * parent) : QUndoCommand(parent), m_view(view), m_oldPos(oldPos), m_oldcomment(oldcomment), m_pos(pos), m_comment(comment), m_doIt(doIt) {