diff --git a/src/miner.cpp b/src/miner.cpp
index 386cb2fe1..691e22d70 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -540,6 +540,7 @@ void static BitcoinMiner(CWallet *pwallet)
         //
         unsigned int nTransactionsUpdatedLast = mempool.GetTransactionsUpdated();
         CBlockIndex* pindexPrev = chainActive.Tip();
+        if(!pindexPrev) break;
 
         auto_ptr<CBlockTemplate> pblocktemplate(CreateNewBlockWithKey(reservekey));
         if (!pblocktemplate.get())
@@ -547,6 +548,7 @@ void static BitcoinMiner(CWallet *pwallet)
         CBlock *pblock = &pblocktemplate->block;
         IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
 
+
         LogPrintf("Running DarkcoinMiner with %u transactions in block (%u bytes)\n", pblock->vtx.size(),
                ::GetSerializeSize(*pblock, SER_NETWORK, PROTOCOL_VERSION));