diff --git a/lib/6to5/transformation/transformers/es6-let-scoping.js b/lib/6to5/transformation/transformers/es6-let-scoping.js
index 44151d58b8..62967bb236 100644
--- a/lib/6to5/transformation/transformers/es6-let-scoping.js
+++ b/lib/6to5/transformation/transformers/es6-let-scoping.js
@@ -37,7 +37,6 @@ exports.VariableDeclaration = function (node, parent) {
 exports.Loop = function (node, parent, file, scope) {
   var init = node.left || node.init;
   if (isLet(init, node)) {
-    t.ensureBlock(node);
     node.body._letDeclars = [init];
   }