diff --git a/ch12_mining.adoc b/ch12_mining.adoc
index 4a084906..21344025 100644
--- a/ch12_mining.adoc
+++ b/ch12_mining.adoc
@@ -1398,7 +1398,7 @@ For some miners,
 the ability to mine without running a full node is another benefit
 of joining a managed pool.
 
-Pool miners connect to the pool server using a mining protocol such as
+Pool miners connect to the pool server using a mining protocol((("Stratum"))) such as
 Stratum (either version 1 or version 2).
 Stratum v1 creates block _templates_ that contain a template of a
 candidate block header. The pool server constructs a candidate block by