diff --git a/src/fitter/fitter.py b/src/fitter/fitter.py
index 86b5a45..90e7085 100644
--- a/src/fitter/fitter.py
+++ b/src/fitter/fitter.py
@@ -386,6 +386,7 @@ def fit(self, progress=False, n_jobs=-1, max_workers=-1, prefer="processes"):
                 "ks_pvalue": self._ks_pval,
             }
         )
+        self.df_errors.sort_index(inplace=True)
 
     def plot_pdf(self, names=None, Nbest=5, lw=2, method="sumsquare_error"):
         """Plots Probability density functions of the distributions