diff --git a/schainpy/Graphics/SpectraPlot.py b/schainpy/Graphics/SpectraPlot.py
index 983dca1..13ae5ba 100644
--- a/schainpy/Graphics/SpectraPlot.py
+++ b/schainpy/Graphics/SpectraPlot.py
@@ -123,7 +123,7 @@ class Spectrum():
                        XAxisAsTime)
         
         if not(self.__isPlotIni):
-            self.iniPlot()
+            self.iniPlot(winTitle)
         
         plplot.plsstrm(self.indexPlot)
         
diff --git a/schainpy/Graphics/VoltagePlot.py b/schainpy/Graphics/VoltagePlot.py
index 98c7f13..b7be1bc 100644
--- a/schainpy/Graphics/VoltagePlot.py
+++ b/schainpy/Graphics/VoltagePlot.py
@@ -104,7 +104,7 @@ class Osciloscope():
             self.setup(titleList, xlabelList, ylabelList, XAxisAsTime)
         
         if not(self.__isPlotIni):
-            self.iniPlot()
+            self.iniPlot(winTitle)
         
         plplot.plsstrm(self.indexPlot)