diff --git a/ch07_authorization-authentication.adoc b/ch07_authorization-authentication.adoc
index 7bdadfa9..e342ce7a 100644
--- a/ch07_authorization-authentication.adoc
+++ b/ch07_authorization-authentication.adoc
@@ -74,7 +74,7 @@ validation mechanism from being used as a vulnerability.
 
 ==== Stateless Verification
 
-The Bitcoin transaction script language is
+The ((("scripts", "stateless verification")))((("stateless script verification")))((("verifying", "scripts")))Bitcoin transaction script language is
 stateless, in that there is no state prior to execution of the script,
 or state saved after execution of the script. All the
 information needed to execute a script is contained within the script