fix issue described in https://twitter.com/mochizune/status/592271577871417344
fix issue described in https://twitter.com/mochizune/status/592271577871417344

Retrospring/retrospring,Shadey/retrospring,Retrospring/retrospring,Retrospring/retrospring,Retrospring/retrospring,Retrospring/retrospring,Shadey/retrospring,Shadey/retrospring