diff --git a/src/main.cpp b/src/main.cpp
index 30e3ab5cb..bf57f8cb2 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -367,7 +367,7 @@ void ProcessBlockAvailability(NodeId nodeid) {
 
     if (!state->hashLastUnknownBlock.IsNull()) {
         BlockMap::iterator itOld = mapBlockIndex.find(state->hashLastUnknownBlock);
-        if (itOld->second != 0 && itOld != mapBlockIndex.end() && itOld->second->nChainWork > 0)
+        if (itOld != mapBlockIndex.end() && itOld->second->nChainWork > 0)
         {
             if (state->pindexBestKnownBlock == NULL || itOld->second->nChainWork >= state->pindexBestKnownBlock->nChainWork)
                 state->pindexBestKnownBlock = itOld->second;
@@ -381,14 +381,14 @@ void UpdateBlockAvailability(NodeId nodeid, const uint256 &hash) {
     CNodeState *state = State(nodeid);
     assert(state != NULL);
 
-    //ProcessBlockAvailability(nodeid);
+    ProcessBlockAvailability(nodeid);
 
-    /*BlockMap::iterator it = mapBlockIndex.find(hash);
+    BlockMap::iterator it = mapBlockIndex.find(hash);
     if (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;
-    } else*/
+    } else
     {
         // An unknown block was announced; just assume that the latest one is the best one.
         state->hashLastUnknownBlock = hash;