diff --git a/core/modules/user/src/Form/UserPermissionsForm.php b/core/modules/user/src/Form/UserPermissionsForm.php
index 854099b..a782f37 100644
--- a/core/modules/user/src/Form/UserPermissionsForm.php
+++ b/core/modules/user/src/Form/UserPermissionsForm.php
@@ -176,7 +176,11 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     }
 
     $form['actions'] = array('#type' => 'actions');
-    $form['actions']['submit'] = array('#type' => 'submit', '#value' => $this->t('Save permissions'));
+    $form['actions']['submit'] = array(
+      '#type' => 'submit',
+      '#value' => $this->t('Save permissions'),
+      '#button_type' => 'primary',
+    );
 
     $form['#attached']['library'][] = 'user/drupal.user.permissions';