diff --git a/airflow/models.py b/airflow/models.py
index <HASH>..<HASH> 100644
--- a/airflow/models.py
+++ b/airflow/models.py
@@ -323,7 +323,7 @@ class Connection(Base):
             elif self.conn_type == 'jdbc':
                 return hooks.JdbcHook(jdbc_conn_id=self.conn_id)
             elif self.conn_type == 'mssql':
-                return hooks.MsSqlHook(conn_id=self.conn_id)
+                return hooks.MsSqlHook(mssql_conn_id=self.conn_id)
         except:
             return None
Added SQL Server to connection admin drop down