diff --git a/ch07.asciidoc b/ch07.asciidoc
index 142268a7..de1327a1 100644
--- a/ch07.asciidoc
+++ b/ch07.asciidoc
@@ -642,7 +642,7 @@ A few more things to consider when reading this example. See if you can find the
 
 ((("segwit (Segregated Witness)", id="Ssegwit07")))Segregated Witness (segwit) is an upgrade to the bitcoin consensus rules and network protocol, proposed and implemented as a BIP-9 soft-fork that was activated on bitcoin's mainnet on August 1st, 2017.
 
-In cryptography, the term "witness" is used to describe a solution to a cryptographic puzzle. In bitcoin terms, the witness satisfies a cryptographic condition placed on a unspent transaction output (UTXO).
+In cryptography, the term "witness" is used to describe a solution to a cryptographic puzzle. In bitcoin terms, the witness satisfies a cryptographic condition placed on an unspent transaction output (UTXO).
 
 In the context of bitcoin, a digital signature is _one type of witness_, but a witness is more broadly any solution that can satisfy the conditions imposed on an UTXO and unlock that UTXO for spending. The term “witness” is a more general term for an “unlocking script” or “scriptSig.”