diff --git a/TODO b/TODO
index f4cf1fdb1..cb745e145 100644
--- a/TODO
+++ b/TODO
@@ -254,4 +254,6 @@ bzero() -> memset()
 ---
 sigblock(), siggetmask(), sigsetmask(), sigmask() -> sigprocmask et al
 ---
+vdprintf() -> similar sized functionality
+---