diff --git a/src/App/Styles/Style.Overwrite.xaml b/src/App/Styles/Style.Overwrite.xaml
index 04431112b371843a09bd433e51f606070a6f09e3..1bf6c5a4c6a7e55cce6eb171659b80fbd6d6885f 100644
--- a/src/App/Styles/Style.Overwrite.xaml
+++ b/src/App/Styles/Style.Overwrite.xaml
@@ -8,6 +8,7 @@
     <Thickness x:Key="TopNavigationViewTopNavGridMargin">0</Thickness>
     <SolidColorBrush x:Key="NavigationViewTopPaneBackground" Color="Transparent" />
     <SolidColorBrush x:Key="NavigationViewContentBackground" Color="Transparent" />
+    <SolidColorBrush x:Key="NavigationViewExpandedPaneBackground" Color="Transparent"/>
 
     <Style x:Key="PageProgressRingStyle" TargetType="muxc:ProgressRing">
         <Setter Property="Width" Value="32" />