diff --git a/config/webpack.config.prod.js b/config/webpack.config.prod.js
index e4b4ef1e37dc978efd9ad4db0b06fca4052d55a5..f372286a279ca81e38bd3af0bd3fa70b693ff681 100644
--- a/config/webpack.config.prod.js
+++ b/config/webpack.config.prod.js
@@ -64,7 +64,10 @@ module.exports = {
       {
         test: /\.css$/,
         include: srcPath,
-        loader: ExtractTextPlugin.extract('style', 'css!postcss')
+        // Disable autoprefixer in css-loader itself:
+        // https://github.com/webpack/css-loader/issues/281
+        // We already have it thanks to postcss.
+        loader: ExtractTextPlugin.extract('style', 'css?-autoprefixer!postcss')
       },
       {
         test: /\.json$/,