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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 5c3eca0032..a1c1c4be38 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -1017,7 +1017,7 @@ class Query:
)
# The used_joins for a tuple of expressions is the union of
# the used_joins for the individual expressions.
- used_joins |= set(k for k, v in self.alias_refcount.items() if v > pre_joins.get(k, 0))
+ used_joins.update(k for k, v in self.alias_refcount.items() if v > pre_joins.get(k, 0))
# For Oracle '' is equivalent to null. The check needs to be done
# at this stage because join promotion can't be done at compiler
# stage. Using DEFAULT_DB_ALIAS isn't nice, but it is the best we