diff --git a/ch08_signatures.adoc b/ch08_signatures.adoc
index 2623d6f5..ac90bb7e 100644
--- a/ch08_signatures.adoc
+++ b/ch08_signatures.adoc
@@ -338,7 +338,7 @@ exactly as it's used in Bitcoin, but we're going to start with a
 simplified version of it and work our way toward the actual protocol in
 stages.
 
-Alice starts by choosing a large random number (+x+), which we call her
+Alice((("digital signatures", "schnorr signature algorithm", "examples of usage")))((("schnorr signature algorithm", "examples of usage"))) starts by choosing a large random number (+x+), which we call her
 _private key_.  She also knows a public point on Bitcoin's elliptic
 curve called the Generator (+G+) (see <<public_key_derivation>>).  Alice uses EC
 multiplication to multiply +G+ by her private key +x+, in which case +x+