diff --git a/todo b/todo
index fbd003c46b..1890d25974 100755
--- a/todo
+++ b/todo
@@ -99,6 +99,8 @@ Limit frequency of disk writes
 MEDIUM-PRIORITY (should do before public release)
 -----------------------
 
+change show_message to use vsprintf
+
 fix bug in test_backend.php where result gets sent twice
 
 add an RPC to verify an account ID (returns DB ID for user)