diff --git a/addons/addon-attach/webpack.config.js b/addons/addon-attach/webpack.config.js
index 599bb142..a882928b 100644
--- a/addons/addon-attach/webpack.config.js
+++ b/addons/addon-attach/webpack.config.js
@@ -26,6 +26,8 @@ module.exports = {
     path: path.resolve('./lib'),
     library: addonName,
     libraryTarget: 'umd'
+    // Force usage of globalThis instead of global / self. (This is cross-env compatible)
+    globalObject: 'globalThis',
   },
   mode: 'production'
 };