diff --git a/core/modules/image/image.post_update.php b/core/modules/image/image.post_update.php
index 7684b94daf..fe41c9f55c 100644
--- a/core/modules/image/image.post_update.php
+++ b/core/modules/image/image.post_update.php
@@ -23,22 +23,22 @@ function image_post_update_image_style_dependencies() {
 }
 
 /**
- * Add filter image style to basic_html and full_html filters.
+ * Add filter image style to basic_html and full_html filter formats.
  */
-function image_enable_filter_image_style() {
-  $filters = ['basic_html' => 11, 'full_html' => 12];
-  foreach ($filters as $filter => $weight) {
-    if ($filter = FilterFormat::load($filter)) {
-      $filter->setFilterConfig('filter_image_style', ['status' => TRUE, 'weight' => $weight]);
-      if (($filter = $filter->filters('filter_html')) && $filter->status) {
-        $config = $filter->getConfiguration();
+function image_post_update_enable_filter_image_style() {
+  $formats = ['basic_html' => 11, 'full_html' => 12];
+  foreach ($formats as $format => $weight) {
+    if ($format = FilterFormat::load($format)) {
+      $format->setFilterConfig('filter_image_style', ['status' => TRUE, 'weight' => $weight]);
+      if (($format = $format->filters('filter_html')) && $format->status) {
+        $config = $format->getConfiguration();
         $allowed_html = !empty($config['settings']['allowed_html']) ? $config['settings']['allowed_html'] : NULL;
         $matches = [];
         if ($allowed_html && preg_match('/<img([^>]*)>/', $allowed_html, $matches)) {
           $new_attributes = array_filter(explode(' ', $matches[1]));
           $new_attributes[] = 'data-image-style';
           $config['settings']['allowed_html'] = preg_replace('/<img([^>]*)>/', '<img ' . implode(' ', array_unique($new_attributes)) . '>', $allowed_html);
-          $filter->setFilterConfig('filter_html', $config);
+          $format->setFilterConfig('filter_html', $config);
         }
       }
     }