diff --git a/examples/batch.php b/examples/batch.php
index 23cf9856f..ea663d8c3 100644
--- a/examples/batch.php
+++ b/examples/batch.php
@@ -58,7 +58,11 @@
  want to execute with keys of our choice - these
  keys will be reflected in the returned array.
 ************************************************/
+
+// NOTE: Some services use `$service->createBatch();` instead of
+// `new Google_Http_Batch($client);`
 $batch = new Google_Http_Batch($client);
+
 $optParams = array('filter' => 'free-ebooks');
 $optParams['q'] = 'Henry David Thoreau';
 $req1 = $service->volumes->listVolumes($optParams);