diff --git a/lib/6to5/transformation/transformers/es6/block-scoping.js b/lib/6to5/transformation/transformers/es6/block-scoping.js
index 7778f36db9..45656ff22f 100644
--- a/lib/6to5/transformation/transformers/es6/block-scoping.js
+++ b/lib/6to5/transformation/transformers/es6/block-scoping.js
@@ -40,7 +40,7 @@ exports.Loop = function (node, parent, scope, context, file) {
   var init = node.left || node.init;
   if (isLet(init, node)) {
     t.ensureBlock(node);
-    node.body._letDeclars = [init];
+    node.body._letDeclarators = [init];
   }
 
   if (t.isLabeledStatement(parent)) {
@@ -260,7 +260,7 @@ var letReferenceBlockVisitor = {
 LetScoping.prototype.getLetReferences = function () {
   var block = this.block;
 
-  var declarators = block._letDeclars || [];
+  var declarators = block._letDeclarators || [];
   var declar;
 
   //