diff --git a/readme.org b/readme.org
index 9d9f3dc..301aa72 100644
--- a/readme.org
+++ b/readme.org
@@ -42,7 +42,7 @@ contains useful overrides for some behavior of the default output
 formats. For example adding *-o letter* to the command-line will
 produce LaTeX files in Letter size rather than the default A5 size.
 You can use *-o list* to generate a text file listing all sections and
-their numbers, or *-o list -t todo* to only list sections tagged as
+their numbers, or *-o list -i todo* to only list sections tagged as
 todo (or substitute whatever other tag(s) you are interested in).
 
 | Name     | Formats | Description                          |