diff --git a/ch12_mining.adoc b/ch12_mining.adoc
index 6608af4f..9e7838f8 100644
--- a/ch12_mining.adoc
+++ b/ch12_mining.adoc
@@ -1,5 +1,5 @@
 [[mining]]
-== Mining and Consensus
+== Mining and Consens
 
 The ((("mining", "purpose of")))word "mining" is somewhat
 misleading. By evoking the extraction of precious metals, it focuses our