Ticket #17922: base_form_label_class_attr.diff

django/forms/forms.py

@@ -165 +165 @@
                     if self.label_suffix:
                         if label[-1] not in ':?.!':
                             label += self.label_suffix
-                    label = bf.label_tag(label) or ''
+                    label_class_attr = {'class': 'required'} if bf.field.required else None
+                    label = bf.label_tag(label, label_class_attr) or ''
                 else:
                     label = ''