diff --git a/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php b/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
index 56f0596..0b52735 100644
--- a/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
+++ b/core/modules/image/src/Plugin/Field/FieldWidget/ImageWidget.php
@@ -289,8 +289,14 @@ public static function validateRequiredFields($element, FormStateInterface $form
   /**
    * Returns the image factory service.
    *
+   * @deprecated in Drupal 8.0.x, will be removed before Drupal 9.0.0.
+   *
    * @return \Drupal\Core\Image\ImageFactory
    *   The image factory service.
+   *
+   * @internal
+   *
+   * @todo Replace this method with proper service injection in 9.0.x.
    */
   protected function getImageFactory() {
     if (!$this->imageFactory) {