diff --git a/lib/sync.js b/lib/sync.js
index f890fea50..e48f0a996 100644
--- a/lib/sync.js
+++ b/lib/sync.js
@@ -475,6 +475,12 @@ SyncApi.prototype._sync = function(syncOptions, attempt) {
     });
 };
 
+/**
+ * Process data returned from a sync response and propagate it
+ * into the model objects
+ *
+ * @param {Object} data The response from /sync
+ */
 SyncApi.prototype._processSyncResponse = function(data) {
     var client = this.client;
     var self = this;