diff --git a/lib/6to5/util.js b/lib/6to5/util.js
index 99551e5174..a7d8ff8415 100644
--- a/lib/6to5/util.js
+++ b/lib/6to5/util.js
@@ -65,7 +65,7 @@ exports.getUid = function (parent, file) {
 
   if (t.isIdentifier(node)) id = node.name;
 
-  return t.identifier(file.generateUid(id));
+  return file.generateUidIdentifier(id);
 };
 
 exports.isAbsolute = function (loc) {