diff --git a/HD Wallets TODO.txt b/HD Wallets TODO.txt
index 3e3a49678..2eaf70603 100644
--- a/HD Wallets TODO.txt	
+++ b/HD Wallets TODO.txt	
@@ -4,6 +4,7 @@
 - Make DeterministicKeyChain auto-extend when a key was observed, to keep a gap limit in place.
 - Support for key rotation
 - Support for auto upgrade
+- Calculate lookahead keys on a background thread.
 - Redo internals of DKC to support arbitrary tree structures.
 - Add a REFUND key purpose and map to the receive tree (for now).