diff --git a/core/modules/field/field.attach.inc b/core/modules/field/field.attach.inc
index 482659e..4d8fdad 100644
--- a/core/modules/field/field.attach.inc
+++ b/core/modules/field/field.attach.inc
@@ -189,8 +189,8 @@ function _field_invoke($op, $entity_type, $entity, &$a = NULL, &$b = NULL, $opti
   // Iterate through the instances and collect results.
   $return = array();
   foreach ($instances as $instance) {
-    $field_name = $instance['field_name'];
-    $field = field_info_field($field_name);
+    $field = field_info_field_by_id($instance['field_id']);
+    $field_name = $field['field_name'];
     $function = $options['default'] ? 'field_default_' . $op : $field['module'] . '_field_' . $op;
     if (function_exists($function)) {
       // Determine the list of languages to iterate on.