diff --git a/demo/issues/298.js b/demo/issues/298.js
new file mode 100644
index 000000000..9ed1da0e0
--- /dev/null
+++ b/demo/issues/298.js
@@ -0,0 +1,15 @@
+
+import {parse} from 'csv-parse/sync';
+
+const camelCaseColumns = (header) => {
+  return header.map((label) => {
+    return label.toUpperCase();
+  });
+};
+console.log(
+  parse('a,b,c\n1,2,3', { encoding: 'utf8',
+    columns: camelCaseColumns,
+    // cast: castToSchema(schema),
+    trim: true,
+  })
+);