diff --git a/ch06_transactions.adoc b/ch06_transactions.adoc
index 20702027..728d6d34 100644
--- a/ch06_transactions.adoc
+++ b/ch06_transactions.adoc
@@ -656,7 +656,7 @@ check whether the policy has changed since publication of this book.
 ====
 Since Bitcoin's inception, every full node has needed to keep a copy of
 every unspent transaction output (UTXO), but that might not always be
-the case.  Several developers have been working on Utreexo, a project
+the case.  Several developers have been working on((("Utreexo"))) Utreexo, a project
 that allows full nodes to store a commitment to the set of UTXOs rather
 than the data itself.  A minimal commitment might be only a kilobyte or
 two in size--compare that to the over five gigabytes Bitcoin Core stores