diff --git a/core/includes/theme.inc b/core/includes/theme.inc
index 2e39687..794b39d 100644
--- a/core/includes/theme.inc
+++ b/core/includes/theme.inc
@@ -1505,10 +1505,11 @@ function template_preprocess_field(&$variables, $hook) {
   // readers.
   $variables['label'] = $element['#title'];
 
-  $variables['multiple'] = FALSE;
-  if ($itemsDefinition = $element['#items']->getFieldDefinition()) {
-    $variables['multiple'] = $itemsDefinition->getFieldStorageDefinition()->isMultiple();
-  }
+
+  // @todo Check for is_object() required due to pseudo field used in
+  // quickedit_test_entity_view_alter(). Remove this check after this is fixed
+  // in https://www.drupal.org/node/2550225.
+  $variables['multiple'] = is_object($element['#items']) ? $element['#items']->getFieldDefinition()->getFieldStorageDefinition()->isMultiple() : FALSE;
 
   static $default_attributes;
   if (!isset($default_attributes)) {