1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_view/helpers/javascripts/controls.js b/actionpack/lib/action_view/helpers/javascripts/controls.js
index f4be26b289..e68820d834 100644
--- a/actionpack/lib/action_view/helpers/javascripts/controls.js
+++ b/actionpack/lib/action_view/helpers/javascripts/controls.js
@@ -116,7 +116,7 @@ Ajax.Autocompleter.prototype = (new Ajax.Base()).extend({
       this.startIndicator();
       this.options.parameters = this.options.callback ?
         this.options.callback(this.element, Form.Element.getValue(this.element)) :
-          Form.Element.getValue(this.element);
+          Form.Element.serialize(this.element);
       new Ajax.Request(this.url, this.options);
     } else {
       this.active = false;