diff --git a/src/utils.js b/src/utils.js
index 085f72e..5350890 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -42,7 +42,7 @@ module.exports = {
         continue
       }
 
-      let values = new Set([...pseudos.map((p) => p.value)])
+      let values = new Set(pseudos.map((p) => p.value))
 
       // The pseudo elements are not the same
       if (values.size > 1) {