diff --git a/ch09_fees.adoc b/ch09_fees.adoc
index 7d32fd67..ff15c2a0 100644
--- a/ch09_fees.adoc
+++ b/ch09_fees.adoc
@@ -56,7 +56,7 @@ management of Bitcoin transactions.
 
 === Who Pays the Transaction Fee?
 
-Most ((("transaction fees", "responsibility for", id="fees-responsibility")))payment systems involve some sort of fee for transacting, but
+Most ((("transaction fees", "responsibility for", id="fees-responsibility")))((("payments", "transaction fees", see="transaction fees")))payment systems involve some sort of fee for transacting, but
 often this fee is hidden from typical buyers.  For example, a merchant
 may advertise the same item for the same price whether you pay with cash
 or a credit card even though their payment processor may charge them