diff --git a/django/db/models/base.py b/django/db/models/base.py
index 9d79a11..a20856b 100644
a
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b
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class Model(six.with_metaclass(ModelBase)):
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1304 | 1304 | used_fields = {} # name or attname -> field |
1305 | 1305 | |
1306 | 1306 | # Check that multi-inheritance doesn't cause field name shadowing. |
1307 | | for parent in cls._meta.parents: |
| 1307 | for parent in cls._meta.get_parent_list(): |
1308 | 1308 | for f in parent._meta.local_fields: |
1309 | 1309 | clash = used_fields.get(f.name) or used_fields.get(f.attname) or None |
1310 | 1310 | if clash: |