diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentDark.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentDark.xaml
index 80ad15ee15..5b6da70233 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentDark.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentDark.xaml
@@ -1,8 +1,8 @@
-
+ xmlns:sys="clr-namespace:System;assembly=netstandard">
+
diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentLight.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentLight.xaml
index 38601a2f2d..5825a2bf34 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentLight.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentLight.xaml
@@ -1,8 +1,8 @@
-
+
diff --git a/src/Avalonia.Themes.Fluent/TextBox.xaml b/src/Avalonia.Themes.Fluent/TextBox.xaml
index 1b766376b5..e89cf2b49c 100644
--- a/src/Avalonia.Themes.Fluent/TextBox.xaml
+++ b/src/Avalonia.Themes.Fluent/TextBox.xaml
@@ -46,9 +46,7 @@
+ Margin="{TemplateBinding BorderThickness}">
-
+