diff --git a/ch11_blockchain.adoc b/ch11_blockchain.adoc
index 56764fcd..65be39b5 100644
--- a/ch11_blockchain.adoc
+++ b/ch11_blockchain.adoc
@@ -301,7 +301,7 @@ first block by Satoshi Nakamoto, Bitcoin's ((("Nakamoto, Satoshi")))((("blockcha
 
 === Linking Blocks in the Blockchain
 
-Bitcoin((("blockchain", "linking blocks", id="blockchain-link")))((("blocks", "linking in blockchain", id="block-link")))((("linking", "blocks in blockchain", id="link-block"))) full nodes validate every
+Bitcoin((("blockchain", "linking blocks", id="blockchain-link")))((("blocks", "linking in blockchain", id="block-link")))((("linking blocks in blockchain", id="link-block"))) full nodes validate every
 block in the blockchain after the genesis block. Their local view of
 the blockchain is constantly updated as new blocks are found and used to
 extend the chain. As a node receives incoming blocks from the network,
@@ -347,7 +347,7 @@ this new block is a child of the last block on the chain and extends the
 existing blockchain. The node adds this new block to the end of the
 chain, making the blockchain longer with a new height of 277,315.
 <<chain_of_blocks>> shows the chain of three blocks, linked by
-references in((("blockchain", "linking blocks", startref="blockchain-link")))((("blocks", "linking in blockchain", startref="block-link")))((("linking", "blocks in blockchain", startref="link-block"))) the +previousblockhash+ field.
+references in((("blockchain", "linking blocks", startref="blockchain-link")))((("blocks", "linking in blockchain", startref="block-link")))((("linking blocks in blockchain", startref="link-block"))) the +previousblockhash+ field.
 
 [[chain_of_blocks]]
 [role="smallerfourtyfive"]