diff --git a/src/apprt/gtk-ng/ui/1.2/surface.blp b/src/apprt/gtk-ng/ui/1.2/surface.blp
index 2b406ce49..a13e0c073 100644
--- a/src/apprt/gtk-ng/ui/1.2/surface.blp
+++ b/src/apprt/gtk-ng/ui/1.2/surface.blp
@@ -2,6 +2,8 @@ using Gtk 4.0;
 using Adw 1;
 
 template $GhosttySurface: Adw.Bin {
+  // A box isn't strictly necessary right now but there will be more
+  // stuff here in the future. There's still a lot to do with surfaces.
   Box {
     orientation: vertical;
     hexpand: true;