diff --git a/ch03.asciidoc b/ch03.asciidoc
index 90c22fa0..6b5e0956 100644
--- a/ch03.asciidoc
+++ b/ch03.asciidoc
@@ -8,7 +8,7 @@
 
 [WARNING]
 ====
-Even though Bitcoin Core includes a reference implementation of a wallet, this is not intended to be used as a production wallet for users or for applications. Application developers are advised to build wallets using modern standards such as BIP39 and BIP32 (see <<mnemonic_code_words>> and <<hd_wallets>>). BIP stands for _Bitcoin Improvement Proposals_.
+((("wallets", "best practices for")))((("bitcoin improvement proposals", "Mnemonic Code Words (BIP39)")))((("bitcoin improvement proposals", "Hierarchical Deterministic Wallets (BIP32/BIP44)")))Even though Bitcoin Core includes a reference implementation of a wallet, this is not intended to be used as a production wallet for users or for applications. Application developers are advised to build wallets using modern standards such as BIP39 and BIP32 (see <<mnemonic_code_words>> and <<hd_wallets>>). BIP stands for _Bitcoin Improvement Proposals_.
 ====
 
 <<bitcoin_core_architecture>> shows the architecture of Bitcoin Core.