diff --git a/symfony/webpack-encore-bundle/1.0/webpack.config.js b/symfony/webpack-encore-bundle/1.0/webpack.config.js
index d85c6c4f..49d00eb7 100644
--- a/symfony/webpack-encore-bundle/1.0/webpack.config.js
+++ b/symfony/webpack-encore-bundle/1.0/webpack.config.js
@@ -1,5 +1,9 @@
 var Encore = require('@symfony/webpack-encore');
 
+if (!Encore.isRuntimeEnvironmentConfigured()) {
+    Encore.configureRuntimeEnvironment(process.env.NODE_ENV || 'dev');
+}
+
 Encore
     // directory where compiled assets will be stored
     .setOutputPath('public/build/')