diff --git a/ch05_wallets.adoc b/ch05_wallets.adoc
index f5ec9103..2b222cfa 100644
--- a/ch05_wallets.adoc
+++ b/ch05_wallets.adoc
@@ -979,7 +979,7 @@ recovery codes (or a value near 128, such as((("wallets", "recovery codes", "see
 [[recovery_passphrase]]
 ===== Optional passphrase in BIP39
 
-The BIP39 standard allows the use of an optional
+The((("wallets", "recovery codes", "passphrases", id="wallet-recovery-bip39-passphrase")))((("recovery codes", "passphrases", id="recovery-code-bip39-passphrase")))((("BIP39 recovery codes", "passphrases", id="bip39-recovery-passphrase")))((("passphrases (for recovery codes)", id="passphrase-optional"))) BIP39 standard allows the use of an optional
 passphrase in the derivation of the seed. If no passphrase is used, the
 recovery code is stretched with a salt consisting of the constant string
 +"mnemonic"+, producing a specific 512-bit seed from any given recovery code.
@@ -1019,7 +1019,7 @@ However, it is important to note that the use of a passphrase also introduces th
 While passphrases are very useful, they should only be used in
 combination with a carefully planned process for backup and recovery,
 considering the possibility of surviving the owner and allowing his or
-her family to recover the cryptocurrency((("wallets", "recovery codes", startref="wallet-recovery-bip39")))((("recovery codes", startref="recovery-code-bip39")))((("BIP39 recovery codes", startref="bip39-recovery"))) estate.
+her family to recover the cryptocurrency((("wallets", "recovery codes", startref="wallet-recovery-bip39")))((("recovery codes", startref="recovery-code-bip39")))((("BIP39 recovery codes", startref="bip39-recovery")))((("wallets", "recovery codes", "passphrases", startref="wallet-recovery-bip39-passphrase")))((("recovery codes", "passphrases", startref="recovery-code-bip39-passphrase")))((("BIP39 recovery codes", "passphrases", startref="bip39-recovery-passphrase")))((("passphrases (for recovery codes)", startref="passphrase-optional"))) estate.
 
 [[hd_wallet_details]]
 ==== Creating an HD Wallet from the Seed