diff --git a/README.md b/README.md
index dbad2e7..91d1685 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ iex> list = String.split("abc1def2ghi3jkl", pattern)
 
 The parser generator [nimble_parsec](https://hex.pm/packages/nimble_parsec) allows a list of codepoint ranges as parameters to several combinators. Unicode Set can generate such ranges:
 ```
-iex> Unicode.Set.utf8_char("[[^abcd][mnb]]")
+iex> Unicode.Set.to_utf8_char("[[^abcd][mnb]]")
 [{:not, 97}, {:not, 98}, {:not, 99}, {:not, 100}, 98, 109, 110]
 ```
 This can be used as shown in the following example: