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-rw-r--r--django/forms/models.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/forms/models.py b/django/forms/models.py
index 628d96b237..ff6b2f0251 100644
--- a/django/forms/models.py
+++ b/django/forms/models.py
@@ -54,7 +54,7 @@ def construct_instance(form, instance, fields=None, exclude=None):
continue
# Leave defaults for fields that aren't in POST data, except for
# checkbox inputs because they don't appear in POST data if not checked.
- if (f.has_default() and f.name not in form.data and
+ if (f.has_default() and form.add_prefix(f.name) not in form.data and
not getattr(form[f.name].field.widget, 'dont_use_model_field_default_for_empty_data', False)):
continue
# Defer saving file-type fields until after the other fields, so a