diff --git a/core/modules/comment/templates/field--comment.html.twig b/core/modules/comment/templates/field--comment.html.twig
index 5aaa7b0..537ca23 100644
--- a/core/modules/comment/templates/field--comment.html.twig
+++ b/core/modules/comment/templates/field--comment.html.twig
@@ -29,7 +29,7 @@
     'field-' ~ entity_type|clean_class ~ '--' ~ field_name|clean_class,
     'field-name-' ~ field_name|clean_class,
     'field-type-' ~ field_type|clean_class,
-    'field-label-' ~ label_display
+    'field-label-' ~ label_display,
     'comment-wrapper'
   ]
 %}