diff --git a/ch04_keys.adoc b/ch04_keys.adoc
index 9639df59..8519c3d6 100644
--- a/ch04_keys.adoc
+++ b/ch04_keys.adoc
@@ -872,7 +872,7 @@ for which she needs to pay transaction fees every time she wants to spend money
 small commitments to large amounts of data also applies here.
 
 The BIP16 upgrade to the Bitcoin protocol in 2012 allows an
-output script to ((("redemption scripts", id="redeem-script")))commit to a _redemption script_ (_redeem script_).  When
+output script to ((("redeem scripts", id="redeem-script")))commit to a _redemption script_ (_redeem script_).  When
 Bob spends his bitcoins, his input script needs to provide a redeem script
 that matches the commitment and also any data necessary to satisfy the
 redeem script (such as signatures).  Let's start by imagining Bob wants
@@ -939,7 +939,7 @@ transactions.
 P2PKH and P2SH are the only two script templates used with base58check
 encoding.  They are now known as legacy addresses and have become less
 common over time.
-Legacy addresses were supplanted by the bech32 family of ((("redemption scripts", startref="redeem-script")))addresses.
+Legacy addresses were supplanted by the bech32 family of ((("redeem scripts", startref="redeem-script")))addresses.
 
 [[p2sh_collision_attacks]]
 .P2SH Collision Attacks