diff --git a/ch06_transactions.adoc b/ch06_transactions.adoc
index e08bd9db..0234bb14 100644
--- a/ch06_transactions.adoc
+++ b/ch06_transactions.adoc
@@ -107,7 +107,7 @@ transactions.
 
 .Protecting Presigned Transactions
 ****
-The last step before broadcasting a transaction to the network for
+The last step ((("transactions", "presigned", id="transaction-presign")))((("presigned transactions", id="presign-transaction")))before broadcasting a transaction to the network for
 inclusion in the blockchain is to sign it.  However, it's possible to
 sign a transaction without broadcasting it immediately.  You can save
 that presigned transaction for months or years in the belief that it
@@ -135,7 +135,7 @@ If you implement a protocol that uses presigned transactions, ensure
 that it doesn't use any features that are reserved for future upgrades.
 Bitcoin Core's default transaction relay policy does not allow the use
 of reserved features.  You can test whether a transaction complies with
-that policy by using the Bitcoin Core RPC +testmempoolaccept+ on Bitcoin
+that policy by using the Bitcoin Core RPC +testmempoolaccept+ on ((("transactions", "presigned", startref="transaction-presign")))((("presigned transactions", startref="presign-transaction")))Bitcoin
 mainnet.
 ****