diff --git a/lib/ui/theme/dynamic_theme_builder.dart b/lib/ui/theme/dynamic_theme_builder.dart
index 5fcd8831ae..233c78b562 100644
--- a/lib/ui/theme/dynamic_theme_builder.dart
+++ b/lib/ui/theme/dynamic_theme_builder.dart
@@ -90,7 +90,7 @@ class _DynamicThemeBuilderState extends State<DynamicThemeBuilder> with WidgetsB
               4: darkCustomTheme,
               5: darkDynamicTheme,
             },
-            fallbackTheme: brightness == Brightness.light ? lightCustomTheme : darkCustomTheme,
+            fallbackTheme: PlatformDispatcher.instance.platformBrightness == Brightness.light ? lightCustomTheme : darkCustomTheme,
           ),
           builder: (context, theme) => MaterialApp(
                 debugShowCheckedModeBanner: false,