diff --git a/ch08.asciidoc b/ch08.asciidoc
index d34f6d58..59bd1307 100644
--- a/ch08.asciidoc
+++ b/ch08.asciidoc
@@ -338,7 +338,7 @@ In a generation transaction, the first two fields are set to values that do not
 
 ==== Coinbase Data
 
-Generation transactions do not have an unlocking script (a.k.a. +scriptSig+) field. Instead, this field is replaced by coinbase data, which must be between 2 and 100 bytes. Except for the first few bytes, the rest of the coinbase data can be used by miners in any way they want; it is arbitrary data. 
+Generation transactions do not have an unlocking script (a.k.a., +scriptSig+) field. Instead, this field is replaced by coinbase data, which must be between 2 and 100 bytes. Except for the first few bytes, the rest of the coinbase data can be used by miners in any way they want; it is arbitrary data. 
 
 In the genesis block, for example, Satoshi Nakamoto added the text "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks" in the coinbase data, using it as a proof of the date and to convey a message. Currently, miners use the coinbase data to include extra nonce values and strings identifying the mining pool, as we will see in the following sections.