diff --git a/ch07_authorization-authentication.adoc b/ch07_authorization-authentication.adoc
index 0e6b8e0a..e2ccce14 100644
--- a/ch07_authorization-authentication.adoc
+++ b/ch07_authorization-authentication.adoc
@@ -958,7 +958,7 @@ CHECKSEQUENCEVERIFY].
 
 === Scripts with Flow Control (Conditional Clauses)
 
-One of the more
+One of((("scripts", "flow control", id="script-flow")))((("flow control in scripts", id="flow-control-script")))((("conditional clauses in scripts", id="conditional-clause-script"))) the more
 powerful features of Bitcoin Script is flow control, also known as
 conditional clauses. You are probably familiar with flow control in
 various programming languages that use the construct +IF...THEN...ELSE+.
@@ -1156,7 +1156,7 @@ Using this construct, we can build redeem scripts with tens or hundreds
 of execution paths, each offering a different way to redeem the UTXO. To
 spend, we construct an input script that navigates the execution
 path by putting the appropriate +TRUE+ and +FALSE+ values on the stack
-at each flow control point.
+at each flow control((("scripts", "flow control", startref="script-flow")))((("flow control in scripts", startref="flow-control-script")))((("conditional clauses in scripts", startref="conditional-clause-script"))) point.
 
 === Complex Script Example