diff --git a/ch02_overview.adoc b/ch02_overview.adoc
index 7301216b..eca6476b 100644
--- a/ch02_overview.adoc
+++ b/ch02_overview.adoc
@@ -22,7 +22,7 @@ produce (through competitive computation) the consensus blockchain,
 which is the authoritative journal of all transactions.
 </p>
 
-<p class="fix_tracking3">
+<p class="fix_tracking2">
 Each example in this chapter is based
 on an actual transaction made on the Bitcoin network, simulating the
 interactions between several users by sending