diff --git a/lib/listToStyles.js b/lib/listToStyles.js
index bc86bb40..048eb32e 100644
--- a/lib/listToStyles.js
+++ b/lib/listToStyles.js
@@ -3,6 +3,8 @@
  * easier to manipulate.
  */
 export default function listToStyles (parentId, list) {
+  // Get default export if list is an ES Module (CSS Loader v4+)
+  list = list.__esModule ? list.default : list
   var styles = []
   var newStyles = {}
   for (var i = 0; i < list.length; i++) {