diff --git a/flaskext/sqlalchemy.py b/flaskext/sqlalchemy.py
index <HASH>..<HASH> 100644
--- a/flaskext/sqlalchemy.py
+++ b/flaskext/sqlalchemy.py
@@ -533,8 +533,6 @@ class SQLAlchemy(object):
         app.config.setdefault('SQLALCHEMY_POOL_TIMEOUT', None)
         app.config.setdefault('SQLALCHEMY_POOL_RECYCLE', None)
 
-        self.app = app
-
         @app.after_request
         def shutdown_session(response):
             self.session.remove()
Don't assign app to self, that is not supported