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-rw-r--r--lib/sqlalchemy/orm/decl_api.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/sqlalchemy/orm/decl_api.py b/lib/sqlalchemy/orm/decl_api.py
index e3e2611da..5f2b3c696 100644
--- a/lib/sqlalchemy/orm/decl_api.py
+++ b/lib/sqlalchemy/orm/decl_api.py
@@ -567,7 +567,7 @@ def _setup_declarative_base(cls: Type[Any]) -> None:
if "metadata" not in cls.__dict__:
cls.metadata = cls.registry.metadata # type: ignore
- if "__init__" not in cls.__dict__:
+ if getattr(cls, "__init__", object.__init__) is object.__init__:
cls.__init__ = cls.registry.constructor