diff --git a/bitcoin-fundamentals-review.asciidoc b/bitcoin-fundamentals-review.asciidoc
index 136d18d..06a774d 100644
--- a/bitcoin-fundamentals-review.asciidoc
+++ b/bitcoin-fundamentals-review.asciidoc
@@ -45,7 +45,7 @@ It is impossible to reverse this calculation. Given a public key +K+, one cannot
 
 Another important tool used extensively in Bitcoin, and in the Lightning Network, are _cryptographic hash functions_ and specifically the +SHA-256+ hash function.
 
-A hash function also known as a _digest function_ is a function that takes arbitrary length data and transforms it into a fixed length result, called the _hash_, _digest_, or _fingerprint_. Importantly, hash functions are _one-way_ functions meaning that you can't reverse them and calculate the input data from the fingerprint.
+A hash function, also known as a _digest function_, is a function that takes arbitrary length data and transforms it into a fixed length result, called the _hash_, _digest_, or _fingerprint_. Importantly, hash functions are _one-way_ functions meaning that you can't reverse them and calculate the input data from the fingerprint.
 
 [[SHA256]]
 .The SHA-256 cryptographic hash algorithm