diff --git a/includes/media.fields.inc b/includes/media.fields.inc
index 26d14f1..2a5d920 100644
--- a/includes/media.fields.inc
+++ b/includes/media.fields.inc
@@ -79,7 +79,7 @@ function media_field_widget_settings_form($field, $instance) {
 
   if ($field['type'] == 'media') {
     // Make the extension list a little more human-friendly by comma-separation.
-    $extensions = str_replace(' ', ', ', $instance['settings']['file_extensions']);
+    $extensions = str_replace(' ', ', ', $settings['file_extensions']);
     $form['file_extensions'] = array(
       '#type' => 'textfield',
       '#title' => t('Allowed file extensions for uploaded files'),