fix compile error
fix compile error

meizhoubao/hackersome,bcambel/oss.io,bcambel/hackersome,bcambel/hackersome,bcambel/oss.io,bcambel/oss.io,bcambel/hackersome,meizhoubao/hackersome,meizhoubao/hackersome,meizhoubao/hackersome,bcambel/hackersome,bcambel/oss.io