diff --git a/ch10.asciidoc b/ch10.asciidoc
index 49769e6f..9243063c 100644
--- a/ch10.asciidoc
+++ b/ch10.asciidoc
@@ -242,7 +242,7 @@ Unlike regular transactions, the coinbase transaction does not consume (spend) U
 
 ==== Coinbase Reward and Fees
 
-((("mining and consensus", "aggregating transactions into blocks", "coinbase reward and fees")))To construct the coinbase transaction, Jing's node first calculates the total amount of transaction fees by adding all the inputs and outputs of the 418 transactions that were added to the block. The fees are calculated as:
+((("mining and consensus", "aggregating transactions into blocks", "coinbase reward and fees")))((("transaction fees")))To construct the coinbase transaction, Jing's node first calculates the total amount of transaction fees by adding all the inputs and outputs of the 418 transactions that were added to the block. The fees are calculated as:
 
 ----
 Total Fees = Sum(Inputs) - Sum(Outputs)