diff --git a/Screenbox/Styles/ItemContainer.xaml b/Screenbox/Styles/ItemContainer.xaml
index 0d60f9857..869938540 100644
--- a/Screenbox/Styles/ItemContainer.xaml
+++ b/Screenbox/Styles/ItemContainer.xaml
@@ -12,6 +12,9 @@
             <x:Double x:Key="TextFillColorSecondaryOpacity">0.775</x:Double>
             <x:Double x:Key="TextFillColorTertiaryOpacity">0.53</x:Double>
 
+            <!--  Fallback for system ThemeResource that is missing on some Windows/WinUI contract versions  -->
+            <StaticResource x:Key="GridViewItemCheckBoxBorderBrush" ResourceKey="ControlStrongStrokeColorDefaultBrush" />
+
             <StaticResource x:Key="MediaGridViewItemBackgroundPointerOver" ResourceKey="ControlFillColorDefaultBrush" />
             <StaticResource x:Key="MediaGridViewItemBackgroundPressed" ResourceKey="ControlAltFillColorTertiaryBrush" />
             <StaticResource x:Key="MediaGridViewItemForegroundPointerOver" ResourceKey="TextFillColorPrimaryBrush" />
@@ -31,6 +34,9 @@
             <x:Double x:Key="TextFillColorSecondaryOpacity">0.695</x:Double>
             <x:Double x:Key="TextFillColorTertiaryOpacity">0.5</x:Double>
 
+            <!--  Fallback for system ThemeResource that is missing on some Windows/WinUI contract versions  -->
+            <StaticResource x:Key="GridViewItemCheckBoxBorderBrush" ResourceKey="ControlStrongStrokeColorDefaultBrush" />
+
             <StaticResource x:Key="MediaGridViewItemBackgroundPointerOver" ResourceKey="ControlFillColorDefaultBrush" />
             <StaticResource x:Key="MediaGridViewItemBackgroundPressed" ResourceKey="LayerFillColorDefaultBrush" />
             <StaticResource x:Key="MediaGridViewItemForegroundPointerOver" ResourceKey="TextFillColorPrimaryBrush" />
@@ -50,6 +56,9 @@
             <x:Double x:Key="TextFillColorSecondaryOpacity">1</x:Double>
             <x:Double x:Key="TextFillColorTertiaryOpacity">1</x:Double>
 
+            <!--  Fallback for system ThemeResource that is missing on some Windows/WinUI contract versions  -->
+            <StaticResource x:Key="GridViewItemCheckBoxBorderBrush" ResourceKey="SystemColorButtonTextColorBrush" />
+
             <StaticResource x:Key="MediaGridViewItemBackgroundPointerOver" ResourceKey="SystemColorHighlightTextColorBrush" />
             <StaticResource x:Key="MediaGridViewItemBackgroundPressed" ResourceKey="SystemColorHighlightTextColorBrush" />
             <StaticResource x:Key="MediaGridViewItemForegroundPointerOver" ResourceKey="SystemColorHighlightColorBrush" />