diff --git a/tgui/rspack.config.cjs b/tgui/rspack.config.cjs
index a2383bab08a..7526fb7824f 100644
--- a/tgui/rspack.config.cjs
+++ b/tgui/rspack.config.cjs
@@ -78,6 +78,7 @@ module.exports = (env = {}, argv) => {
             {
               loader: 'builtin:swc-loader',
               options: {
+                isModule: 'unknown',
                 jsc: {
                   parser: {
                     syntax: 'typescript',