diff --git a/src/textual/screen.py b/src/textual/screen.py
index 4b6c49d425..584827ba2a 100644
--- a/src/textual/screen.py
+++ b/src/textual/screen.py
@@ -1125,7 +1125,8 @@ async def _on_update(self, message: messages.Update) -> None:
         widget = message.widget
         assert isinstance(widget, Widget)
 
-        if widget in self._compositor.widgets:
+        compositor = self._compositor
+        if widget in compositor.widgets or widget in compositor.full_map:
             self._dirty_widgets.add(widget)
             self.check_idle()