diff --git a/core/src/toga/window.py b/core/src/toga/window.py
index 53b741913..dd236dbd4 100644
--- a/core/src/toga/window.py
+++ b/core/src/toga/window.py
@@ -155,9 +155,6 @@ class Window:
         self._app = app
         self._impl.set_app(app._impl)
 
-        if self.content:
-            self.content.app = app
-
     @property
     def _default_title(self) -> str:
         return "Toga"