bugfix: Issue #32
bugfix: Issue #32

cloudwu/pbc,boyuegame/pbc,zh423328/pbc,zhuoyikang/pbc,cloudwu/pbc,yubobarye/pbc,owent-contrib/pbc,CheyiLin/pbc,MonCoder/pbc,xiaoqunSun/pbc,owent-contrib/pbc,DoooReyn/pbc