--- sexy_exposed.module
+++ sexy_exposed.module
@@ -55,7 +64,7 @@
   foreach ($view->filter as $filter_id => $filter) {
     $options = &$filter->options;
     if ($options['exposed'] && !empty($options['expose']['sexy'])) {
-      $needs_sexy_love['select#edit-'. form_clean_id($options['expose']['identifier'])] = $options['expose']['sexy_number'];
+      $needs_sexy_love['select#edit-'. form_clean_id($options['expose']['identifier'])] = (isset($options['expose']['sexy_number'])) ? $options['expose']['sexy_number'] : 0;
     }
   }