diff --git a/packages/docusaurus/src/webpack/utils.ts b/packages/docusaurus/src/webpack/utils.ts
index 4c8e22b80381..63fb0edf662a 100644
--- a/packages/docusaurus/src/webpack/utils.ts
+++ b/packages/docusaurus/src/webpack/utils.ts
@@ -36,10 +36,16 @@ import {memoize} from 'lodash';
 // Utility method to get style loaders
 export function getStyleLoaders(
   isServer: boolean,
-  cssOptions: {
+  cssOptionsArg: {
     [key: string]: unknown;
   } = {},
 ): RuleSetRule[] {
+  const cssOptions: {[key: string]: unknown} = {
+    // TODO turn esModule on later, see https://github.com/facebook/docusaurus/pull/6424
+    esModule: false,
+    ...cssOptionsArg,
+  };
+
   if (isServer) {
     return cssOptions.modules
       ? [