diff --git a/config/webpack.config.dev.js b/config/webpack.config.dev.js
index 65b3936ccb8..00ac03580c6 100644
--- a/config/webpack.config.dev.js
+++ b/config/webpack.config.dev.js
@@ -30,7 +30,7 @@ var faviconPath = path.resolve(__dirname, relativePath, 'favicon.ico');
 var buildPath = path.join(__dirname, isInNodeModules ? '../../..' : '..', 'build');
 
 module.exports = {
-  devtool: 'eval',
+  devtool: 'eval-source-map',
   entry: [
     require.resolve('webpack-dev-server/client') + '?http://localhost:3000',
     require.resolve('webpack/hot/dev-server'),