diff --git a/metplotpy/plots/roc_diagram/roc_diagram_series.py b/metplotpy/plots/roc_diagram/roc_diagram_series.py
index 7f8f1590..23638f48 100644
--- a/metplotpy/plots/roc_diagram/roc_diagram_series.py
+++ b/metplotpy/plots/roc_diagram/roc_diagram_series.py
@@ -88,7 +88,6 @@ def _create_series_points(self):
         elif self.config.linetype_pct:
             roc_df = pstats._calc_pct_roc(subset_df)
             pody = roc_df['pody']
-            pody = pd.Series([1]).append(pody, ignore_index=True)
             pody = pd.concat([pd.Series([1]), pody], ignore_index=True)
             pody = pd.concat([pody, pd.Series([0])])
             pofd = roc_df['pofd']