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-rw-r--r--django/db/models/sql/subqueries.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/django/db/models/sql/subqueries.py b/django/db/models/sql/subqueries.py
index 6b52729f68..a066dfeca8 100644
--- a/django/db/models/sql/subqueries.py
+++ b/django/db/models/sql/subqueries.py
@@ -131,7 +131,7 @@ class UpdateQuery(Query):
for model, values in self.related_updates.iteritems():
query = UpdateQuery(model)
query.values = values
- if self.related_ids:
+ if self.related_ids is not None:
query.add_filter(('pk__in', self.related_ids))
result.append(query)
return result