diff --git a/ch12_mining.adoc b/ch12_mining.adoc
index 4ad94149..a3622ae0 100644
--- a/ch12_mining.adoc
+++ b/ch12_mining.adoc
@@ -1612,7 +1612,7 @@ Bitcoin ((("decentralized consensus", "hashrate attacks", startref="decentral-co
 [[consensus_changes]]
 === Changing the Consensus Rules
 
-The rules of consensus determine the validity of
+The rules((("consensus rules"))) of consensus determine the validity of
 transactions and blocks. These rules are the basis for collaboration
 between all Bitcoin nodes and are responsible for the convergence of all
 local perspectives into a single consistent blockchain across the entire