diff --git a/src/damaris/gui/DamarisGUI.py b/src/damaris/gui/DamarisGUI.py
index b8b1083..d840235 100644
--- a/src/damaris/gui/DamarisGUI.py
+++ b/src/damaris/gui/DamarisGUI.py
@@ -4015,13 +4015,13 @@ class MonitorWidgets:
 
                     # finally decide about x log plot
                     if x_scale == "log10" and xmin > 0:
-                        self.matplot_axes.set_xscale( "log", basex=10.0 )
+                        self.matplot_axes.set_xscale( "log", base=10.0 )
                         self.matplot_axes.fmt_xdata = lambda x: "%g" % x
                     #elif x_scale=="log" and xmin>0:
                     # e scaling implementation not really useful
                     #    self.matplot_axes.set_xscale("log", basex=numpy.e)
                     if y_scale == "log10" and ymin > 0:
-                        self.matplot_axes.set_yscale( "log", basex=10.0 )
+                        self.matplot_axes.set_yscale( "log", base=10.0 )
                         self.matplot_axes.fmt_ydata = lambda x: "%g" % x
 
                     self.__rescale = False