diff --git a/lib/6to5/transformation/transformers/es7-generator-comprehension.js b/lib/6to5/transformation/transformers/es7-generator-comprehension.js
index 3a102474c4..cb469ef1ce 100644
--- a/lib/6to5/transformation/transformers/es7-generator-comprehension.js
+++ b/lib/6to5/transformation/transformers/es7-generator-comprehension.js
@@ -6,6 +6,7 @@ exports.ComprehensionExpression = function (node) {
 
   var body = [];
   var container = t.functionExpression(null, [], t.blockStatement(body), true);
+  container._aliasFunction = true
 
   body.push(arrayComprehension._build(node, function () {
     return t.expressionStatement(t.yieldExpression(node.body));