diff --git a/ch14_applications.adoc b/ch14_applications.adoc
index 6202705c..ee348b22 100644
--- a/ch14_applications.adoc
+++ b/ch14_applications.adoc
@@ -172,7 +172,7 @@ pay to contract, and client-side validation.
 [[single_use_seals]]
 ==== Single-Use Seals
 
-Single-use seals originate in physical security.  Someone shipping an
+Single-use seals ((("colored coins application", "single-use seals")))((("single-use seals")))originate in physical security.  Someone shipping an
 item through a third party needs a way to detect tampering, so they
 secure their package with a special mechanism that will become clearly
 damaged if the package is opened.  If the package arrives with the seal