diff --git a/src/gui_2.py b/src/gui_2.py
index 7d645b21..6793917a 100644
--- a/src/gui_2.py
+++ b/src/gui_2.py
@@ -6370,10 +6370,10 @@ def render_theme_panel(app: App) -> None:
   ch_ct, ctrans = imgui.slider_float("##ctrans", theme.get_child_transparency(), 0.1, 1.0, "%.2f")
   if ch_ct:
    theme.set_child_transparency(ctrans)
-  bg_enabled       = getattr(self, 'bg_shader_enabled', False)
+  bg_enabled       = getattr(app, 'bg_shader_enabled', False)
   ch_bg, new_bg    = imgui.checkbox("Animated Background Shader", bg_enabled)
   if ch_bg and new_bg != bg_enabled:
-   self.bg_shader_enabled = new_bg
+   app.bg_shader_enabled = new_bg
    gui_cfg = app.config.setdefault("gui", {})
    gui_cfg["bg_shader_enabled"] = new_bg
    if hasattr(app, "_flush_to_config"): app._flush_to_config()