diff --git a/src/optimize/base_optimizer.js b/src/optimize/base_optimizer.js
index ca558a600d3f..8828069cc28b 100644
--- a/src/optimize/base_optimizer.js
+++ b/src/optimize/base_optimizer.js
@@ -71,18 +71,18 @@ class BaseOptimizer {
 
     const makeStyleLoader = preprocessor => {
       let loaders = [
-        loaderWithSourceMaps('css-loader')
+        loaderWithSourceMaps('css-loader?autoprefixer=false'),
+        {
+          name: 'postcss-loader',
+          query: {
+            config: require.resolve('./postcss.config')
+          }
+        },
       ];
 
       if (preprocessor) {
         loaders = [
           ...loaders,
-          {
-            name: 'postcss-loader',
-            query: {
-              config: require.resolve('./postcss.config')
-            }
-          },
           loaderWithSourceMaps(preprocessor)
         ];
       }