diff --git a/app/gui/oven_control/mainwindow.cpp b/app/gui/oven_control/mainwindow.cpp
index a5ee144..cbdf8f1 100644
--- a/app/gui/oven_control/mainwindow.cpp
+++ b/app/gui/oven_control/mainwindow.cpp
@@ -19,9 +19,6 @@ MainWindow::MainWindow(QWidget *parent) :
 {
     ui->setupUi(this);
 
-    //for singletone event debug
-    pcombiButton = ui->helpButton;
-
     oven = Oven::getInstance();
 
     OvenController *interface = new OvenController(this, oven);
diff --git a/app/gui/oven_control/mainwindow.h b/app/gui/oven_control/mainwindow.h
index e4e39e7..e2d8abb 100644
--- a/app/gui/oven_control/mainwindow.h
+++ b/app/gui/oven_control/mainwindow.h
@@ -18,8 +18,6 @@ class MainWindow : public QMainWindow
     Q_OBJECT
 
 public:
-    //for singtone event debug
-    QPushButton *pcombiButton;
     explicit MainWindow(QWidget *parent = 0);
     ~MainWindow();