diff --git a/packages/kit/src/runtime/server/parse_body/read_only_form_data.js b/packages/kit/src/runtime/server/parse_body/read_only_form_data.js
index 4978ef455323..9f4aaeb965ac 100644
--- a/packages/kit/src/runtime/server/parse_body/read_only_form_data.js
+++ b/packages/kit/src/runtime/server/parse_body/read_only_form_data.js
@@ -19,7 +19,7 @@ export function read_only_form_data() {
 	};
 }
 
-export class ReadOnlyFormData {
+class ReadOnlyFormData {
 	/** @type {Map<string, string[]>} */
 	#map;