diff --git a/media.views.inc b/media.views.inc
index 5fd2c02f2001fde097c56810f3ef12ce535d680d..bf22d49192aa483867c0d9e0d411584ac275a520 100644
--- a/media.views.inc
+++ b/media.views.inc
@@ -127,7 +127,7 @@ function template_preprocess_media_views_view_media_browser(&$vars) {
   $vars['wrapper_suffix'] = '</div>';
   $vars['list_type_prefix'] = '<' . $handler->options['type'] . ' id="media-browser-library-list" class="' . implode(' ', $class) . '">';
   $vars['list_type_suffix'] = '</' . $handler->options['type'] . '>';
-  $vars['aria_role'] = $params['multiselect'] ? 'checkbox' : 'radio';
+  $vars['aria_role'] = (isset($params['multiselect']) && $params['multiselect']) ? 'checkbox' : 'radio';
 
   // Run theming variables through a standard Views preprocess function.
   template_preprocess_views_view_unformatted($vars);