diff --git a/src/main.cpp b/src/main.cpp
index 6b2e779db..012495594 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -264,9 +264,9 @@ void UpdatePreferredDownload(CNode* node, CNodeState* state)
 }
 
 // Returns time at which to timeout block request (nTime in microseconds)
-int64_t GetBlockTimeout(int64_t nTime, int nValidatedQueuedBefore)
+int64_t GetBlockTimeout(int64_t nTime, int nValidatedQueuedBefore, const Consensus::Params &consensusParams)
 {
-    return nTime + 500000 * Params().GetConsensus().nPowTargetSpacing * (4 + nValidatedQueuedBefore);
+    return nTime + 500000 * consensusParams.nPowTargetSpacing * (4 + nValidatedQueuedBefore);
 }
 
 void InitializeNode(NodeId nodeid, const CNode *pnode) {
@@ -310,7 +310,7 @@ void MarkBlockAsReceived(const uint256& hash) {
 }
 
 // Requires cs_main.
-void MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, CBlockIndex *pindex = NULL) {
+void MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, const Consensus::Params& consensusParams, CBlockIndex *pindex = NULL) {
     CNodeState *state = State(nodeid);
     assert(state != NULL);
 
@@ -318,7 +318,7 @@ void MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, CBlockIndex *pindex
     MarkBlockAsReceived(hash);
 
     int64_t nNow = GetTimeMicros();
-    QueuedBlock newentry = {hash, pindex, nNow, pindex != NULL, GetBlockTimeout(nNow, nQueuedValidatedHeaders)};
+    QueuedBlock newentry = {hash, pindex, nNow, pindex != NULL, GetBlockTimeout(nNow, nQueuedValidatedHeaders, consensusParams)};
     nQueuedValidatedHeaders += newentry.fValidatedHeaders;
     list<QueuedBlock>::iterator it = state->vBlocksInFlight.insert(state->vBlocksInFlight.end(), newentry);
     state->nBlocksInFlight++;
@@ -4181,7 +4181,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
                         vToFetch.push_back(inv);
                         // Mark block as in flight already, even though the actual "getdata" message only goes out
                         // later (within the same cs_main lock, though).
-                        MarkBlockAsInFlight(pfrom->GetId(), inv.hash);
+                        MarkBlockAsInFlight(pfrom->GetId(), inv.hash, chainparams.GetConsensus());
                     }
                     LogPrint("net", "getheaders (%d) %s to peer=%d\n", pindexBestHeader->nHeight, inv.hash.ToString(), pfrom->id);
                 }
@@ -5034,7 +5034,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
         // more quickly than once every 5 minutes, then we'll shorten the download window for this block).
         if (!pto->fDisconnect && state.vBlocksInFlight.size() > 0) {
             QueuedBlock &queuedBlock = state.vBlocksInFlight.front();
-            int64_t nTimeoutIfRequestedNow = GetBlockTimeout(nNow, nQueuedValidatedHeaders - state.nBlocksInFlightValidHeaders);
+            int64_t nTimeoutIfRequestedNow = GetBlockTimeout(nNow, nQueuedValidatedHeaders - state.nBlocksInFlightValidHeaders, consensusParams);
             if (queuedBlock.nTimeDisconnect > nTimeoutIfRequestedNow) {
                 LogPrint("net", "Reducing block download timeout for peer=%d block=%s, orig=%d new=%d\n", pto->id, queuedBlock.hash.ToString(), queuedBlock.nTimeDisconnect, nTimeoutIfRequestedNow);
                 queuedBlock.nTimeDisconnect = nTimeoutIfRequestedNow;
@@ -5055,7 +5055,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
             FindNextBlocksToDownload(pto->GetId(), MAX_BLOCKS_IN_TRANSIT_PER_PEER - state.nBlocksInFlight, vToDownload, staller);
             BOOST_FOREACH(CBlockIndex *pindex, vToDownload) {
                 vGetData.push_back(CInv(MSG_BLOCK, pindex->GetBlockHash()));
-                MarkBlockAsInFlight(pto->GetId(), pindex->GetBlockHash(), pindex);
+                MarkBlockAsInFlight(pto->GetId(), pindex->GetBlockHash(), consensusParams, pindex);
                 LogPrint("net", "Requesting block %s (%d) peer=%d\n", pindex->GetBlockHash().ToString(),
                     pindex->nHeight, pto->id);
             }