diff --git a/src/sl-decimators.py b/src/sl-decimators.py
index 3151404ecf7cfea8ac9d116fd099b762318a9e4c..f6a6a3159a12ad8dd139c8433f32b24e2e625366 100644
--- a/src/sl-decimators.py
+++ b/src/sl-decimators.py
@@ -15,9 +15,9 @@ devicelist['contollo'] = PyTango.DeviceProxy('srv-tango-srf-01:20000/ec-sl-slpsr
 devicelist['frequenza'] = PyTango.DeviceProxy('srv-tango-srf-01:20000/f/timing/bunchnumber_f')
 selettore = PyTango.DeviceProxy("srv-tango-srf-01:20000/sl/laser/calendar_sl.01").activityNum
 
-class Finestra(QTabWidget):
+class MainWindow(QTabWidget):
     def __init__(self, parent=None):
-        super(Finestra, self).__init__(parent)
+        super(MainWindow, self).__init__(parent)
         self.paginagenerale = QFrame()
         self.paginagenerale_1facileindicatore = QLineEdit()
         self.paginagenerale_1etichetta = QLabel('f/timing/rttrigger_sl.01')
@@ -1415,6 +1415,6 @@ class LineEditRO(QLineEdit):
 
 
 app = QApplication([])
-main = Finestra()
+main = MainWindow()
 main.show()
 app.exec_()