diff --git a/src/Avalonia.Themes.Fluent/CaptionButtons.xaml b/src/Avalonia.Themes.Fluent/CaptionButtons.xaml
index 20efcafcfd..e5177bbdad 100644
--- a/src/Avalonia.Themes.Fluent/CaptionButtons.xaml
+++ b/src/Avalonia.Themes.Fluent/CaptionButtons.xaml
@@ -64,4 +64,4 @@
   <Style Selector="CaptionButtons:fullscreen Panel#PART_FullScreenButton Path">
     <Setter Property="Data" Value="M205 1024h819v-819h-205v469l-674 -674l-145 145l674 674h-469v205zM1374 1229h469v-205h-819v819h205v-469l674 674l145 -145z" />
   </Style>
- Styles>
+ </Styles>