diff --git a/gtk/gtkmenubutton.c b/gtk/gtkmenubutton.c
index 6552165824..d36b905770 100644
--- a/gtk/gtkmenubutton.c
+++ b/gtk/gtkmenubutton.c
@@ -1021,7 +1021,8 @@ gtk_menu_button_set_icon_name (GtkMenuButton *menu_button,
   box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
   gtk_widget_set_halign (box, GTK_ALIGN_CENTER);
 
-  // Because we are setting only an icon, let the inner button be labeled by us, so the accessible label can be overridden
+  /* Because we are setting only an icon, let the inner button be labeled by us
+  so the accessible label can be overridden from, for example, an UI file using GtkMenuButton as a child of something. */
   gtk_accessible_update_relation (GTK_ACCESSIBLE (menu_button->button), GTK_ACCESSIBLE_RELATION_LABELLED_BY, menu_button, NULL, -1);
 
   image_widget = g_object_new (GTK_TYPE_IMAGE,
@@ -1156,7 +1157,6 @@ gtk_menu_button_set_label (GtkMenuButton *menu_button,
   gtk_button_set_child (GTK_BUTTON (menu_button->button), box);
   menu_button->label_widget = label_widget;
 
-  // When the user explicitly set a label assume that it should be announced by assistive technologies as well
   gtk_accessible_update_relation (GTK_ACCESSIBLE (menu_button->button), GTK_ACCESSIBLE_RELATION_LABELLED_BY, menu_button->label_widget, NULL, -1);
 
   menu_button->image_widget = NULL;