diff --git a/_static/matplotlibrc b/_static/matplotlibrc
index 8e4d7b61a07..6a88f8ba578 100644
--- a/_static/matplotlibrc
+++ b/_static/matplotlibrc
@@ -409,6 +409,7 @@ backend      : qt5agg
 #legend.scatterpoints : 1        # number of scatter points
 #legend.markerscale   : 1.0      # the relative size of legend markers vs. original
 #legend.fontsize      : medium
+#legend.titlesize      : medium
 # Dimensions as fraction of fontsize:
 #legend.borderpad     : 0.4      # border whitespace
 #legend.labelspacing  : 0.5      # the vertical space between the legend entries