diff --git a/src/sas/qtgui/Calculators/GenericScatteringCalculator.py b/src/sas/qtgui/Calculators/GenericScatteringCalculator.py
index 12da7d7226..4a11843d85 100644
--- a/src/sas/qtgui/Calculators/GenericScatteringCalculator.py
+++ b/src/sas/qtgui/Calculators/GenericScatteringCalculator.py
@@ -1793,7 +1793,5 @@ def closeEvent(self, event):
 class Plotter3D(QtWidgets.QDialog, Plotter3DWidget):
     def __init__(self, parent=None, graph_title=''):
         self.graph_title = graph_title
-        QtWidgets.QDialog.__init__(self)
         Plotter3DWidget.__init__(self, manager=parent)
         self.setWindowTitle(self.graph_title)
-