diff --git a/plotter.py b/plotter.py
index 78a45b4..92b2a31 100644
--- a/plotter.py
+++ b/plotter.py
@@ -1219,7 +1219,6 @@ class Plotter(Aggregator, BaseProcessor):
                 self._plot,
                 "/series/" + logrule + "/" + name_x,
                 "/series/" + logrule + "/" + name_y,
-                xunit=U.Myr,
             ),
             description=description,
             kind="series",