diff --git a/ch07_authorization-authentication.adoc b/ch07_authorization-authentication.adoc
index e2ccce14..cd2e2347 100644
--- a/ch07_authorization-authentication.adoc
+++ b/ch07_authorization-authentication.adoc
@@ -1020,7 +1020,7 @@ comes _before_ the +IF+ opcode.
 ==== Conditional Clauses with VERIFY Opcodes
 
 Another
-form of conditional in Bitcoin Script is any opcode that ends in
+form of ((("VERIFY opcodes")))((("guard clauses in scripts")))conditional in Bitcoin Script is any opcode that ends in
 +VERIFY+. The +VERIFY+ suffix means that if the condition evaluated is
 not +TRUE+, execution of the script terminates immediately and the
 transaction is deemed invalid.