diff --git a/lib/bigquery/dataset.js b/lib/bigquery/dataset.js
index 7997e26f7af..2ebcf3413cd 100644
--- a/lib/bigquery/dataset.js
+++ b/lib/bigquery/dataset.js
@@ -244,14 +244,14 @@ Dataset.prototype.query = function(options, callback) {
  *   description: 'Information for every institution in the 2013 IPEDS universe'
  * };
  *
- * dataset.setMetadata(metadata, function(err, apiResponse) {});
+ * dataset.setMetadata(metadata, function(err, metadata, apiResponse) {});
  */
 Dataset.prototype.setMetadata = function(metadata, callback) {
   var that = this;
 
   this.makeReq_('PATCH', '', null, metadata, function(err, resp) {
     if (err) {
-      callback(err, resp);
+      callback(err, null, resp);
       return;
     }