diff --git a/src/index.js b/src/index.js
index 9accf48f..6814aa60 100644
--- a/src/index.js
+++ b/src/index.js
@@ -393,6 +393,8 @@ function createConfig(options, entry, format, writeMeta) {
 	const peerDeps = Object.keys(pkg.peerDependencies || {});
 	if (options.external === 'none') {
 		// bundle everything (external=[])
+	} else if (options.external === 'natives') {
+		external = external.concat(require('module').builtinModules);
 	} else if (options.external) {
 		external = external.concat(peerDeps).concat(options.external.split(','));
 	} else {