diff --git a/ch05_wallets.adoc b/ch05_wallets.adoc
index b6ec3b6a..553be9f8 100644
--- a/ch05_wallets.adoc
+++ b/ch05_wallets.adoc
@@ -348,7 +348,7 @@ status].
 
 .Recovery Code Passphrases
 ****
-The BIP39, Electrum v2, Aezeed, and SLIP39 schemes may all be used with an
+The BIP39, ((("passphrases (for recovery codes)", id="passphrase")))Electrum v2, Aezeed, and SLIP39 schemes may all be used with an
 optional passphrase.  If the only place you keep this passphrase is in
 your memory, it has the same advantages and disadvantages as memorizing
 your recovery code.  However, there's a further set of trade-offs
@@ -403,7 +403,7 @@ Many users and developers disagree on which approach is better, with
 some strongly in favor of plausible deniability and others preferring the
 increased safety that error detection gives novice users and those under
 duress.  We suspect the debate will continue for as long as recovery
-codes continue to be widely ((("wallets", "recovery codes", startref="wallet-recovery2")))((("recovery codes", startref="recovery-code2")))used.
+codes continue to be widely ((("wallets", "recovery codes", startref="wallet-recovery2")))((("recovery codes", startref="recovery-code2")))((("passphrases (for recovery codes)", startref="passphrase")))used.
 ****
 
 ==== Backing Up Nonkey Data