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-rw-r--r--lib/sqlalchemy/sql/selectable.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/sql/selectable.py b/lib/sqlalchemy/sql/selectable.py
index 11ef99f09..43aff7caa 100644
--- a/lib/sqlalchemy/sql/selectable.py
+++ b/lib/sqlalchemy/sql/selectable.py
@@ -905,7 +905,7 @@ class Join(FromClause):
if col is not None:
if self._cols_populated:
self._columns[col._label] = col
- self.foreign_keys.add(col)
+ self.foreign_keys.update(col.foreign_keys)
if col.primary_key:
self.primary_key.add(col)
return col