extern unsigned int nTransactionsUpdated;
extern uint64_t nLastBlockTx;
extern uint64_t nLastBlockSize;
-extern int64_t nLastCoinStakeSearchInterval;
+extern uint32_t nLastCoinStakeSearchInterval;
extern const std::string strMessageMagic;
extern int64_t nTimeBestReceived;
extern CCriticalSection cs_setpwalletRegistered;