diff --git a/engine/storage_mysql.go b/engine/storage_mysql.go
index c49c88378..6e84dc10a 100644
--- a/engine/storage_mysql.go
+++ b/engine/storage_mysql.go
@@ -27,7 +27,7 @@ import (
 )
 
 type MySQLStorage struct {
-	*SQLStorage
+	SQLStorage
 }
 
 func NewMySQLStorage(host, port, name, user, password string, maxConn, maxIdleConn int) (*SQLStorage, error) {
@@ -43,6 +43,8 @@ func NewMySQLStorage(host, port, name, user, password string, maxConn, maxIdleCo
 	db.DB().SetMaxOpenConns(maxConn)
 	//db.LogMode(true)
 	mySQLStorage := new(MySQLStorage)
+	mySQLStorage.db = db
+	mySQLStorage.Db = db.DB()
 	return &SQLStorage{db.DB(), db, mySQLStorage, mySQLStorage}, nil
 }
 
diff --git a/engine/storage_postgres.go b/engine/storage_postgres.go
index 0ab686960..4dbe81a65 100644
--- a/engine/storage_postgres.go
+++ b/engine/storage_postgres.go
@@ -40,11 +40,13 @@ func NewPostgresStorage(host, port, name, user, password string, maxConn, maxIdl
 	db.DB().SetMaxOpenConns(maxConn)
 	//db.LogMode(true)
 	postgressStorage := new(PostgresStorage)
+	postgressStorage.db = db
+	postgressStorage.Db = db.DB()
 	return &SQLStorage{db.DB(), db, postgressStorage, postgressStorage}, nil
 }
 
 type PostgresStorage struct {
-	*SQLStorage
+	SQLStorage
 }
 
 func (self *PostgresStorage) SetVersions(vrs Versions, overwrite bool) (err error) {