diff --git a/crates/typst-syntax/src/highlight.rs b/crates/typst-syntax/src/highlight.rs
index 0c1f3d5fd..7128c3584 100644
--- a/crates/typst-syntax/src/highlight.rs
+++ b/crates/typst-syntax/src/highlight.rs
@@ -286,6 +286,9 @@ pub fn highlight(node: &LinkedNode) -> Option<Tag> {
         SyntaxKind::Destructuring => None,
         SyntaxKind::DestructAssignment => None,
 
+        // TODO
+        SyntaxKind::Decorator => Some(Tag::Comment),
+
         SyntaxKind::LineComment => Some(Tag::Comment),
         SyntaxKind::BlockComment => Some(Tag::Comment),
         SyntaxKind::Error => Some(Tag::Error),
diff --git a/crates/typst-syntax/src/kind.rs b/crates/typst-syntax/src/kind.rs
index 7505dbc61..769cdd72d 100644
--- a/crates/typst-syntax/src/kind.rs
+++ b/crates/typst-syntax/src/kind.rs
@@ -278,6 +278,9 @@ pub enum SyntaxKind {
     Destructuring,
     /// A destructuring assignment expression: `(x, y) = (1, 2)`.
     DestructAssignment,
+
+    /// A decorator: `/! allow("amogus")`
+    Decorator,
 }
 
 impl SyntaxKind {
@@ -498,6 +501,7 @@ impl SyntaxKind {
             Self::FuncReturn => "`return` expression",
             Self::Destructuring => "destructuring pattern",
             Self::DestructAssignment => "destructuring assignment expression",
+            Self::Decorator => "decorator",
         }
     }
 }
diff --git a/crates/typst-syntax/src/lexer.rs b/crates/typst-syntax/src/lexer.rs
index dd05e73f2..502c458de 100644
--- a/crates/typst-syntax/src/lexer.rs
+++ b/crates/typst-syntax/src/lexer.rs
@@ -151,6 +151,10 @@ impl Lexer<'_> {
         }
     }
 
+    fn decorator(&mut self) -> SyntaxKind {
+        todo!()
+    }
+
     fn line_comment(&mut self) -> SyntaxKind {
         self.s.eat_until(is_newline);
         SyntaxKind::LineComment