diff --git a/block_pool.go b/block_pool.go
index 003d1db58..2dbe11069 100644
--- a/block_pool.go
+++ b/block_pool.go
@@ -97,9 +97,9 @@ func (self *BlockPool) Add(b *ethchain.Block, peer *Peer) {
 		self.hashPool = append(self.hashPool, b.Hash())
 		self.pool[hash] = &block{peer, peer, b, time.Now(), 0}
 
-		if !self.eth.BlockChain().HasBlock(b.PrevHash) && !self.fetchingHashes {
-			//poollogger.Infof("Unknown block, requesting parent (%x...)\n", b.PrevHash[0:4])
-			//peer.QueueMessage(ethwire.NewMessage(ethwire.MsgGetBlockHashesTy, []interface{}{b.PrevHash, uint32(256)}))
+		if !self.eth.BlockChain().HasBlock(b.PrevHash) && self.pool[string(b.PrevHash)] == nil && !self.fetchingHashes {
+			poollogger.Infof("Unknown block, requesting parent (%x...)\n", b.PrevHash[0:4])
+			//peer.QueueMessage(ethwire.NewMessage(ethwire.MsgGetBlockHashesTy, []interface{}{b.Hash(), uint32(256)}))
 		}
 	} else if self.pool[hash] != nil {
 		self.pool[hash].block = b