diff --git a/regex/todo.txt b/regex/todo.txt
index aff725b..d04724a 100644
--- a/regex/todo.txt
+++ b/regex/todo.txt
@@ -4,4 +4,5 @@
 Ideas for flags:
     -m <num> : Print <num>th match (-m 1 = first match, -m 2 = second match)
     -g <num> : Print the <num>th group
+    -r : Specify a directory instead of a file, reads recursively
 4. Refactor code for flags - make each flag's code a function, which modifies the result of findAllMatches