diff --git a/services/web/frontend/js/features/source-editor/lezer-typst/tokens.mjs b/services/web/frontend/js/features/source-editor/lezer-typst/tokens.mjs
index e3a5f1436f..54d6b26668 100644
--- a/services/web/frontend/js/features/source-editor/lezer-typst/tokens.mjs
+++ b/services/web/frontend/js/features/source-editor/lezer-typst/tokens.mjs
@@ -321,10 +321,10 @@ export const codeIdentTokenizer = new ExternalTokenizer(
     if (!stack.canShift(CodeIdent)) return
 
     // Guard: only fire in code context.
-    // Walk back past any horizontal whitespace (@skip) to the nearest
-    // non-space character and check that it is a code-mode delimiter.
+    // Walk back past whitespace (including newlines inside multi-line arg lists)
+    // to the nearest non-space character and check that it is a code-mode delimiter.
     let back = -1
-    while (input.peek(back) === SPACE || input.peek(back) === TAB) back--
+    while (input.peek(back) === SPACE || input.peek(back) === TAB || input.peek(back) === NEWLINE) back--
     const prev = input.peek(back)
     if (prev !== HASH && prev !== DOT && prev !== OPEN_PAREN && prev !== COMMA) return