diff --git a/ch06.asciidoc b/ch06.asciidoc
index 71d4bfe6..dc1095fe 100644
--- a/ch06.asciidoc
+++ b/ch06.asciidoc
@@ -191,7 +191,7 @@ Consider our example in <<transactions_behind_the_scenes>>. The transaction inpu
 
 As you can see, there is only one input in the list (because one UTXO contained sufficient value to make this payment). The input contains four elements:
 
-* A transaction ID, referencing the transaction that contains the UTXO being spent
+* A ((("transactions", "transaction IDs")))transaction ID, referencing the transaction that contains the UTXO being spent
 * An output index (+vout+), identifying which UTXO from that transaction is referenced (first one is zero)
 * A +scriptSig+, which satisfies the conditions placed on the UTXO, unlocking it for spending
 * A sequence number (to be discussed later)