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-rw-r--r--lib/sqlalchemy/ext/serializer.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/ext/serializer.py b/lib/sqlalchemy/ext/serializer.py
index 8abd1fdf3..cb5cf4f25 100644
--- a/lib/sqlalchemy/ext/serializer.py
+++ b/lib/sqlalchemy/ext/serializer.py
@@ -82,7 +82,7 @@ def Serializer(*args, **kw):
elif isinstance(obj, Table):
id = "table:" + str(obj)
elif isinstance(obj, Column) and isinstance(obj.table, Table):
- id = "column:" + str(obj.table) + ":" + obj.key
+ id = "column:" + str(obj.table) + ":" + str(obj.key)
elif isinstance(obj, Session):
id = "session:"
elif isinstance(obj, Engine):