diff --git a/lib/6to5/transformation/transformers/es6/classes.js b/lib/6to5/transformation/transformers/es6/classes.js
index 5388489bdb..de547859f3 100644
--- a/lib/6to5/transformation/transformers/es6/classes.js
+++ b/lib/6to5/transformation/transformers/es6/classes.js
@@ -99,8 +99,7 @@ ClassTransformer.prototype.run = function () {
     closureArgs.push(superName);
 
     if (!t.isIdentifier(superName)) {
-      var superRef = this.scope.generateUidBasedOnNode(superName, this.file);
-      superName = superRef;
+      superName = this.scope.generateUidBasedOnNode(superName, this.file);
     }
 
     closureParams.push(superName);