diff --git a/core/modules/editor/editor.admin.inc b/core/modules/editor/editor.admin.inc
index 69acabe..7924505 100644
--- a/core/modules/editor/editor.admin.inc
+++ b/core/modules/editor/editor.admin.inc
@@ -33,6 +33,7 @@ function editor_image_upload_settings_form(Editor $editor) {
     'directory' => 'inline-images',
     'max_size' => '',
     'max_dimensions' => array('width' => '', 'height' => ''),
+    'require_alt_text' => FALSE,
   );
 
   $form['status'] = array(
@@ -127,5 +128,13 @@ function editor_image_upload_settings_form(Editor $editor) {
     '#states' => $show_if_image_uploads_enabled,
   );
 
+  $form['require_alt_text'] = array(
+    '#type' => 'checkbox',
+    '#default_value' => $image_upload['require_alt_text'],
+    '#title' => t('Require alt text'),
+    '#description' => t('If this is checked, alternative text field for images will always be required.'),
+    '#states' => $show_if_image_uploads_enabled,
+  );
+
   return $form;
 }
diff --git a/core/modules/editor/src/Form/EditorImageDialog.php b/core/modules/editor/src/Form/EditorImageDialog.php
index 893b5a4..f32d6c1 100644
--- a/core/modules/editor/src/Form/EditorImageDialog.php
+++ b/core/modules/editor/src/Form/EditorImageDialog.php
@@ -98,6 +98,7 @@ public function buildForm(array $form, array &$form_state, FilterFormat $filter_
       '#type' => 'textfield',
       '#default_value' => isset($image_element['alt']) ? $image_element['alt'] : '',
       '#maxlength' => 2048,
+      '#required' => $image_upload['require_alt_text'],
     );
     $form['dimensions'] = array(
       '#type' => 'item',