diff --git a/lib/builder/webpack/base.mjs b/lib/builder/webpack/base.mjs
index 606dccd38..0a58e1918 100644
--- a/lib/builder/webpack/base.mjs
+++ b/lib/builder/webpack/base.mjs
@@ -216,7 +216,7 @@ export default class WebpackBaseConfig {
     }
 
     // CSS extraction
-    if (this.options.build.extractCSSS) {
+    if (this.options.build.extractCSS) {
       plugins.push(new MiniCssExtractPlugin(Object.assign({
         filename: this.getFileName('css')
       }, this.options.build.extractCSS)))