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diff --git a/src/mailman/database/alembic/env.py b/src/mailman/database/alembic/env.py
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+# Copyright (C) 2014 by the Free Software Foundation, Inc.
+#
+# This file is part of GNU Mailman.
+#
+# GNU Mailman is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Alembic migration environment."""
+
+from __future__ import absolute_import, print_function, unicode_literals
+
+__metaclass__ = type
+__all__ = [
+    'run_migrations_offline',
+    'run_migrations_online',
+    ]
+
+
+from alembic import context
+from contextlib import closing
+from sqlalchemy import create_engine
+
+from mailman.config import config
+from mailman.database.model import Model
+from mailman.utilities.string import expand
+
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL and not an Engine,
+    though an Engine is acceptable here as well.  By skipping the Engine
+    creation we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the script
+    output.
+    """
+    url = expand(config.database.url, config.paths)
+    context.configure(url=url, target_metadata=Model.metadata)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine and associate a
+    connection with the context.
+    """
+    url = expand(config.database.url, config.paths)
+    engine = create_engine(url)
+
+    connection = engine.connect()
+    with closing(connection):
+        context.configure(
+            connection=connection, target_metadata=Model.metadata)
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()