diff --git a/js/search_api_autocomplete.js b/js/search_api_autocomplete.js
index 1226e94..ba98d35 100644
--- a/js/search_api_autocomplete.js
+++ b/js/search_api_autocomplete.js
@@ -6,6 +6,9 @@
 (function ($) {
 
   var oldSelect = Drupal.autocomplete.options.select;
+  // Override the "select" option of the jQueryUI auto-complete to
+  // add the functionality to submit the form if the auto_submit class
+  // is present.
   Drupal.autocomplete.options.select = function (event, ui) {
     oldSelect.call(this, event, ui);
     if ($(this).hasClass('auto_submit')) {