diff --git a/src/miner.cpp b/src/miner.cpp
index 093549eaf..7a856ae29 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -436,7 +436,7 @@ void static BitcoinMiner(const CChainParams& chainparams)
             unsigned int nTransactionsUpdatedLast = mempool.GetTransactionsUpdated();
             CBlockIndex* pindexPrev = chainActive.Tip();
             int64_t *nFees;
-            auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(chainparams, coinbaseScript->reserveScript, nFees, false));
+            std::unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(chainparams, coinbaseScript->reserveScript, nFees, false));
             if (!pblocktemplate.get())
             {
                 LogPrintf("Error in BitcoinMiner: Keypool ran out, please call keypoolrefill before restarting the mining thread\n");
@@ -646,7 +646,7 @@ void ThreadStakeMiner(CWallet *pwallet, const CChainParams& chainparams)
         // Create new block
         //
         int64_t nFees;
-        auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(chainparams, reservekey.reserveScript, &nFees, true));
+        std::unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(chainparams, reservekey.reserveScript, &nFees, true));
         if (!pblocktemplate.get())
              return;
 
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 27be0299d..254fbc300 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -818,7 +818,7 @@ UniValue checkkernel(const UniValue& params, bool fHelp)
 	    	pwalletMain->TopUpKeyPool();
 
 	    CReserveKey pMiningKey(pwalletMain);
-	    auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(Params(), pMiningKey.reserveScript, &nFees, true));
+	    std::unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(Params(), pMiningKey.reserveScript, &nFees, true));
 	    if (!pblocktemplate.get())
 	    	throw JSONRPCError(RPC_INTERNAL_ERROR, "Couldn't create new block");