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-rw-r--r--lib/sqlalchemy/sql.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql.py b/lib/sqlalchemy/sql.py
index 489e9d59e..f9ac753fa 100644
--- a/lib/sqlalchemy/sql.py
+++ b/lib/sqlalchemy/sql.py
@@ -2775,7 +2775,7 @@ class Select(_SelectBaseMixin, FromClause):
self.is_scalar = scalar
if scalar:
# allow corresponding_column to return None
- self.orig_set = []
+ self.orig_set = util.Set()
# indicates if this select statement, as a subquery, should automatically correlate
# its FROM clause to that of an enclosing select, update, or delete statement.