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-rw-r--r--django/db/models/sql/query.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index 40ec57f9de..e6af36b4e9 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -950,7 +950,7 @@ class Query(object):
if model in seen:
return seen[model]
chain = opts.get_base_chain(model)
- if chain is None:
+ if not chain:
return alias
curr_opts = opts
for int_model in chain: