diff --git a/packages/standard-minifier-js/plugin/minify-js.js b/packages/standard-minifier-js/plugin/minify-js.js
index dfc1237f98..80a7835367 100644
--- a/packages/standard-minifier-js/plugin/minify-js.js
+++ b/packages/standard-minifier-js/plugin/minify-js.js
@@ -10,7 +10,7 @@ Plugin.registerMinifier({
 class MeteorBabelMinifier {
 
   processFilesForBundle (files, options) {
-    var mode = options.minifyMode;
+    const mode = options.minifyMode;
 
     // don't minify anything for development
     if (mode === 'development') {