diff --git a/django/forms/models.py b/django/forms/models.py
index b560ee84a9..42c62d5770 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -573,7 +573,7 @@ class BaseModelFormSet(BaseFormSet):
     def _get_to_python(self, field):
         """
         If the field is a related field, fetch the concrete field's (that
-        is, the ultimate pointed-to field's) get_prep_value.
+        is, the ultimate pointed-to field's) to_python.
         """
         while field.rel is not None:
             field = field.rel.get_related_field()