diff --git a/multiselectfield/db/fields.py b/multiselectfield/db/fields.py
index 7d4eef6..65cf8ab 100644
--- a/multiselectfield/db/fields.py
+++ b/multiselectfield/db/fields.py
@@ -160,7 +160,7 @@ def contribute_to_class(self, cls, name):
         if self.choices:
             def get_list(obj):
                 fieldname = name
-                choicedict = dict(self.choices)
+                choicedict = dict(self.flatchoices)
                 display = []
                 if getattr(obj, fieldname):
                     for value in getattr(obj, fieldname):