diff --git a/ch07_authorization-authentication.adoc b/ch07_authorization-authentication.adoc
index f4eafd8f..79e3b9ab 100644
--- a/ch07_authorization-authentication.adoc
+++ b/ch07_authorization-authentication.adoc
@@ -657,7 +657,7 @@ scripts in outputs:
 
 ==== Redeem Script and Validation
 
-You are not able to put a P2SH inside a P2SH redeem script, because the
+You are((("redeem scripts", "validating")))((("validating", "redeem scripts"))) not able to put a P2SH inside a P2SH redeem script, because the
 P2SH specification is not recursive. Also, while it is technically
 possible to include +OP_RETURN+ (see <<op_return>>) in a redeem script, as
 nothing in the rules prevents you from doing so, it is of no practical