diff --git a/book/src/callbacks.md b/book/src/callbacks.md
index 59326b74..469cfde5 100644
--- a/book/src/callbacks.md
+++ b/book/src/callbacks.md
@@ -68,4 +68,4 @@ where regular expressions are too limiting. For specifics look at
 [`Lexer::remainder`](https://docs.rs/logos/latest/logos/struct.Lexer.html#method.remainder) and
 [`Lexer::bump`](https://docs.rs/logos/latest/logos/struct.Lexer.html#method.bump).
 
-Callbacks can also be used with #[logos(skip)], in which case they will ignore the return type of the callback.
\ No newline at end of file
+Callbacks can also be used with #[logos(skip)], in which case the callback should return `Skip` or `()`.
\ No newline at end of file