--- a/services/sync/modules/record.js
+++ b/services/sync/modules/record.js
@@ -606,23 +606,23 @@ Collection.prototype = {
   // index
   get sort() { return this._sort; },
   set sort(value) {
     this._sort = value;
     this._rebuildURL();
   },
 
   // Set information about the batch for this request.
-  get batch() { return _batch; },
+  get batch() { return this._batch; },
   set batch(value) {
     this._batch = value;
     this._rebuildURL();
   },
 
-  get commit() { return _commit; },
+  get commit() { return this._commit; },
   set commit(value) {
     this._commit = value && true;
     this._rebuildURL();
   },
 
   set recordHandler(onRecord) {
     // Save this because onProgress is called with this as the ChannelListener
     let coll = this;