diff --git a/ch05_wallets.adoc b/ch05_wallets.adoc
index 3953449c..77c43fdf 100644
--- a/ch05_wallets.adoc
+++ b/ch05_wallets.adoc
@@ -418,7 +418,7 @@ just keys--they also also store user-provided information about every
 transaction they sent or received.
 
 For example, when Bob creates a new address as part of sending an
-invoice to Alice, he adds a _label_ to the address he generates
+invoice to Alice, he ((("labels", "backing up", id="label-backup")))adds a _label_ to the address he generates
 so that he can distinguish her payment
 from other payments he receives.  When Alice pays Bob's address, she
 labels the transaction as paying Bob for the same reason.  Some wallets
@@ -472,7 +472,7 @@ data.
 
 Additionally, it may be useful for wallet applications to provide a
 standardized format to export labels so that they can be used in other
-applications, e.g., accounting software.  A standard for that format is
+applications, e.g., accounting software.  A standard for that ((("labels", "backing up", startref="label-backup")))format is
 proposed in BIP329.
 
 Wallet applications implementing additional protocols beyond basic