diff --git a/whalrus/ballots/ballot_levels.py b/whalrus/ballots/ballot_levels.py
index 0139645..c71030e 100644
--- a/whalrus/ballots/ballot_levels.py
+++ b/whalrus/ballots/ballot_levels.py
@@ -99,8 +99,9 @@ def as_dict(self) -> NiceDict:
     @cached_property
     def as_weak_order(self) -> list:
         if isinstance(self.scale, ScaleFromList):
-            return [NiceSet(k for k in self.as_dict.keys() if self.as_dict[k] == list(self.as_dict.values())[v])
-                for v in self.scale.argsort(list(set(self.as_dict.values())), reverse=True)]
+            present_val = list(set(self.as_dict.values()))
+            return [NiceSet(k for k in self.as_dict.keys() if self.as_dict[k] == present_val[v])
+                for v in self.scale.argsort(present_val, reverse = True)]
         return [NiceSet(k for k in self.as_dict.keys() if self.as_dict[k] == v)
                 for v in sorted(set(self.as_dict.values()), reverse=True)]