diff --git a/README b/README
index 0539d8f..ff92c00 100644
--- a/README
+++ b/README
@@ -43,6 +43,7 @@ nl
 nohup
 paste
 printenv
+printf
 pwd
 readlink
 renice
diff --git a/TODO b/TODO
index b160baa..6b276cd 100644
--- a/TODO
+++ b/TODO
@@ -4,8 +4,6 @@ expr [expression]
 
 id [-ruGgn] username
 
-printf format [argument...]
-
 test [expression...]
 
 tr: