diff --git a/lib/6to5/transformation/transformers/es6-destructuring.js b/lib/6to5/transformation/transformers/es6-destructuring.js
index bcd04ba4b2..8b1f5ae882 100644
--- a/lib/6to5/transformation/transformers/es6-destructuring.js
+++ b/lib/6to5/transformation/transformers/es6-destructuring.js
@@ -249,10 +249,9 @@ exports.AssignmentExpression = function (node, parent, scope, context, file) {
   if (parent.type === "ExpressionStatement") return;
   if (!t.isPattern(node.left)) return;
 
-  var tempName = file.generateUid("temp", scope);
-  var ref = t.identifier(tempName);
+  var ref = file.generateUidIdentifier("temp", scope);
   scope.push({
-    key: tempName,
+    key: ref.name,
     id: ref
   });
 
diff --git a/lib/6to5/transformation/transformers/es6-let-scoping.js b/lib/6to5/transformation/transformers/es6-let-scoping.js
index 7c589851cd..d6ccf9078f 100644
--- a/lib/6to5/transformation/transformers/es6-let-scoping.js
+++ b/lib/6to5/transformation/transformers/es6-let-scoping.js
@@ -226,7 +226,7 @@ LetScoping.prototype.getInfo = function () {
     if (has && has !== id) {
       // there's a variable with this exact name in an upper scope so we need
       // to generate a new name
-      opts.duplicates[key] = id.name = file.generateUid(key, scope);
+      opts.duplicates[key] = id.name = file.generateUidIdentifier(key, scope).name;
       opts.hasDuplicates = true;
     }
   };