diff --git a/ch07_authorization-authentication.adoc b/ch07_authorization-authentication.adoc
index b9a1ae57..95d6b177 100644
--- a/ch07_authorization-authentication.adoc
+++ b/ch07_authorization-authentication.adoc
@@ -50,7 +50,7 @@ conditions for spending and how those conditions can be satisfied.
 
 [TIP]
 ====
-Bitcoin transaction validation is not based on
+Bitcoin transaction validation((("transactions", "validating")))((("validating", "transactions"))) is not based on
 a static pattern, but instead is achieved through the execution of a
 scripting language. This language allows for a nearly infinite variety
 of conditions to be expressed.