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-rw-r--r--django/db/models/query.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/db/models/query.py b/django/db/models/query.py
index 08fda78332..44acadf037 100644
--- a/django/db/models/query.py
+++ b/django/db/models/query.py
@@ -1266,7 +1266,7 @@ def get_klass_info(klass, max_depth=0, cur_depth=0, requested=None,
return None
if only_load:
- load_fields = only_load.get(klass)
+ load_fields = only_load.get(klass) or set()
# When we create the object, we will also be creating populating
# all the parent classes, so traverse the parent classes looking
# for fields that must be included on load.