diff --git a/src/tokens.md b/src/tokens.md
index 1ba44b654..88e472897 100644
--- a/src/tokens.md
+++ b/src/tokens.md
@@ -889,16 +889,23 @@ r[lex.token.reserved-prefix.edition2021]
## Reserved guards
+r[lex.token.reserved-guards]
+
+r[lex.token.reserved-guards.syntax]
> **Lexer 2024+**\
> RESERVED_GUARDED_STRING_LITERAL : `#`+ [STRING_LITERAL]\
> RESERVED_POUNDS : `#`2..
+r[lex.token.reserved-guards.intro]
The reserved guards are syntax reserved for future use, and will generate a compile error if used.
+r[lex.token.reserved-guards.string-literal]
The *reserved guarded string literal* is a token of one or more `U+0023` (`#`) immediately followed by a [STRING_LITERAL].
+r[lex.token.reserved-guards.pounds]
The *reserved pounds* is a token of two or more `U+0023` (`#`).
+r[lex.token.reserved-guards.edition2024]
> **Edition differences**: Before the 2024 edition, reserved guards are accepted by the lexer and interpreted as multiple tokens. For example, the `#"foo"#` form is interpreted as three tokens. `##` is interpreted as two tokens.
[Inferred types]: types/inferred.md