diff --git a/ch05_wallets.adoc b/ch05_wallets.adoc
index a60b5e67..dc09ec0c 100644
--- a/ch05_wallets.adoc
+++ b/ch05_wallets.adoc
@@ -1450,7 +1450,7 @@ because the possibilities for internal organization into branches and
 subbranches are endless.
 
 Two BIPs offer a solution to this complexity by creating some proposed
-standards for the structure of HD wallet trees. BIP43 proposes the use
+standards for the structure of HD wallet trees. ((("BIP43 HD wallet tree structure")))BIP43 proposes the use
 of the first hardened child index as a special identifier that signifies
 the "purpose" of the tree structure. Based on BIP43, an HD wallet
 should use only one level-1 branch of the tree, with the index number
@@ -1459,7 +1459,7 @@ defining its purpose. For example, an HD wallet using only branch
 m/i++'++/ is intended to signify a specific purpose and that
 purpose is identified by index number "i."
 
-Extending that specification, BIP44 proposes a multiaccount structure
+Extending that specification, ((("BIP44 HD wallet tree structure")))BIP44 proposes a multiaccount structure
 as "purpose" number +44'+ under BIP43. All HD wallets following the
 BIP44 structure are identified by the fact that they only used one
 branch of the tree: m/44'/.