diff --git a/src/main.cpp b/src/main.cpp
index 777926200..99800a600 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -384,7 +384,7 @@ void UpdateBlockAvailability(NodeId nodeid, const uint256 &hash) {
     ProcessBlockAvailability(nodeid);
 
     BlockMap::iterator it = mapBlockIndex.find(hash);
-    if (it != mapBlockIndex.end() && it->second->nChainWork > 0) {
+    if (it->second != 0 && it != mapBlockIndex.end() && it->second->nChainWork > 0) {
         // An actually better block was announced.
         if (state->pindexBestKnownBlock == NULL || it->second->nChainWork >= state->pindexBestKnownBlock->nChainWork)
             state->pindexBestKnownBlock = it->second;
@@ -740,7 +740,7 @@ int32_t komodo_validate_interest(uint32_t *expiredp,const CTransaction& tx,uint3
                 if ( txheighttime > 1490159171 || (locktime == 0 && txheighttime >= 1490159171) ) // 246748
                 {
                     if ( tx.nLockTime != 1477258935 )
-                        fprintf(stderr,"komodo_validate_interest reject.%d locktime %u/%u vs nBlockTime %u txheighttime.%u tiptime.%u txb.%u cmp.%u\n",txheight,(uint32_t)tx.nLockTime,locktime,(uint32_t)chainActive.Tip()->nTime,txheighttime,tiptime,txblocktime,cmptime);
+                        fprintf(stderr,"komodo_validate_interest reject.%d  [%d] locktime %u/%u vs nBlockTime %u txheighttime.%u tiptime.%u txb.%u cmp.%u\n",txheight,(int32_t)(tx.nLockTime - (cmptime-3600)),(uint32_t)tx.nLockTime,locktime,(uint32_t)chainActive.Tip()->nTime,txheighttime,tiptime,txblocktime,cmptime);
                     if ( expiredp != 0 )
                         *expiredp = cmptime-3600;
                     return(-1);
diff --git a/src/miner.cpp b/src/miner.cpp
index c73122ffd..3caf774c0 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -202,7 +202,7 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
                                     ? nMedianTimePast
                                     : pblock->GetBlockTime();
 
-            if (tx.IsCoinBase() || !IsFinalTx(&expired,tx, nHeight, nLockTimeCutoff,STANDARD_LOCKTIME_VERIFY_FLAGS,pblock->nTime))
+            if (tx.IsCoinBase() || !IsFinalTx(&expired,tx, nHeight, nLockTimeCutoff,STANDARD_LOCKTIME_VERIFY_FLAGS,chainActive.Tip()->nTime+600))
             {
                 if ( expired != 0 )
                 {