diff --git a/core/modules/image/image.field.inc b/core/modules/image/image.field.inc
index ceb2c8a..32b0e65 100644
--- a/core/modules/image/image.field.inc
+++ b/core/modules/image/image.field.inc
@@ -368,7 +368,7 @@ function image_field_widget_process($element, &$form_state, $form) {
     '#maxlength' => 1024,
     '#weight' => -1,
     '#access' => (bool) $item['fid'] && $element['#title_field'],
-    '#element_validate' => $settings['alt_field_required'] == 1 ? array('_image_field_required_fields_validate') : array(),
+    '#element_validate' => $settings['title_field_required'] == 1 ? array('_image_field_required_fields_validate') : array(),
   );
 
   return $element;