diff --git a/openmc/mgxs/mgxs.py b/openmc/mgxs/mgxs.py
index 088db649fa..c12c61bdf4 100644
--- a/openmc/mgxs/mgxs.py
+++ b/openmc/mgxs/mgxs.py
@@ -1517,6 +1517,7 @@ class MGXS(object):
                 densities = self.get_nuclide_densities(nuclides)
             else:
                 densities = self.get_nuclide_densities('sum')
+            densities = np.repeat(densities, len(self.rxn_rate_tally.scores))
             tile_factor = df.shape[0] / len(densities)
             df['mean'] /= np.tile(densities, tile_factor)
             df['std. dev.'] /= np.tile(densities, tile_factor)