diff --git a/sephiria_inv/gui.py b/sephiria_inv/gui.py
index 41c1f07..fd419ff 100644
--- a/sephiria_inv/gui.py
+++ b/sephiria_inv/gui.py
@@ -398,7 +398,7 @@ class ScreenshotFrame(ttk.Frame):
     def __init__(self, master, on_confirmed) -> None:
         super().__init__(master, padding=6)
         self.on_confirmed = on_confirmed
-        self.slot_var = master.master.slot_var  # type: ignore[attr-defined]
+        self.slot_var = master.winfo_toplevel().slot_var  # type: ignore[attr-defined]
         self.image: Optional[Image.Image] = None
         self.bbox: Optional[Tuple[int, int, int, int]] = None
         self.cells: List[CellResult] = []