diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index 7aa3d59..0840496 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -1069,15 +1069,18 @@ function comment_view_multiple($comments, $view_mode = 'full', $langcode = NULL)
  * Implements hook_form_FORM_ID_alter() for field_ui_field_edit_form().
  */
 function comment_form_field_ui_field_edit_form_alter(&$form, $form_state) {
-  // Collect translation settings.
-  if (module_exists('translation_entity')) {
-    array_unshift($form['#submit'], 'comment_translation_configuration_element_submit');
-  }
-  // Hide required checkbox.
-  $form['instance']['required']['#access'] = FALSE;
+  if ($form['#field']['type'] == 'comment') {
+    // Collect translation settings.
+    if (module_exists('translation_entity')) {
+      array_unshift($form['#submit'], 'comment_translation_configuration_element_submit');
+    }
 
-  // Force cardinality to one.
-  $form['field']['cardinality']['#options'] = drupal_map_assoc(array(1));
+    // Hide required checkbox.
+    $form['instance']['required']['#access'] = FALSE;
+
+    // Force cardinality to one.
+    $form['field']['cardinality']['#options'] = drupal_map_assoc(array(1));
+  }
 }
 
 /**