diff --git a/ch09_fees.adoc b/ch09_fees.adoc
index 45bea65a..fa7278fd 100644
--- a/ch09_fees.adoc
+++ b/ch09_fees.adoc
@@ -618,7 +618,7 @@ you intended.
 [[fee_sniping]]
 === Timelock Defense Against Fee Sniping
 
-Fee sniping is a theoretical
+Fee sniping ((("transaction fees", "fee sniping", id="transaction-fee-sniping")))((("fee sniping", id="fee-snipe")))((("timelocks", "fee sniping and", id="timelock-fee-snipe")))((("lock time", "fee sniping and", id="lock-time-fee-snipe")))is a theoretical
 attack scenario, where miners attempting to rewrite past blocks "snipe"
 higher-fee transactions from future blocks to maximize their
 profitability.
@@ -663,5 +663,5 @@ other uses of the lock time field.
 As Bitcoin continues to mature, and as the subsidy continues to decline,
 fees become more and more important to Bitcoin users, both in their
 day-to-day use for getting transactions confirmed quickly and in
-providing an incentive for miners to continue securing Bitcoin
+providing an incentive for miners to continue securing((("transaction fees", "fee sniping", startref="transaction-fee-sniping")))((("fee sniping", startref="fee-snipe")))((("timelocks", "fee sniping and", startref="timelock-fee-snipe")))((("lock time", "fee sniping and", startref="lock-time-fee-snipe"))) Bitcoin
 transactions with new proof of work.