diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Styles/TabControl.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Styles/TabControl.xaml
index 7f2bb15d8bf..ac0cf317d88 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Styles/TabControl.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Styles/TabControl.xaml
@@ -212,8 +212,8 @@
         <Setter Property="BorderBrush" Value="Transparent" />
         <Setter Property="HorizontalAlignment" Value="Stretch" />
         <Setter Property="VerticalAlignment" Value="Stretch" />
-        <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
-        <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
+        <Setter Property="VerticalContentAlignment" Value="Stretch" />
+        <Setter Property="HorizontalContentAlignment" Value="Stretch" />
         <Setter Property="FocusVisualStyle" Value="{DynamicResource DefaultControlFocusVisualStyle}" />
         <Setter Property="KeyboardNavigation.IsTabStop" Value="True" />
         <Setter Property="Focusable" Value="True" />
diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Dark.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Dark.xaml
index c6b9515728d..9d9f38e7769 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Dark.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Dark.xaml
@@ -4037,8 +4037,8 @@
     <Setter Property="BorderBrush" Value="Transparent" />
     <Setter Property="HorizontalAlignment" Value="Stretch" />
     <Setter Property="VerticalAlignment" Value="Stretch" />
-    <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
-    <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
+    <Setter Property="VerticalContentAlignment" Value="Stretch" />
+    <Setter Property="HorizontalContentAlignment" Value="Stretch" />
     <Setter Property="FocusVisualStyle" Value="{DynamicResource DefaultControlFocusVisualStyle}" />
     <Setter Property="KeyboardNavigation.IsTabStop" Value="True" />
     <Setter Property="Focusable" Value="True" />
diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.HC.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.HC.xaml
index dd85f6acd66..843bde173f6 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.HC.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.HC.xaml
@@ -4015,8 +4015,8 @@
     <Setter Property="BorderBrush" Value="Transparent" />
     <Setter Property="HorizontalAlignment" Value="Stretch" />
     <Setter Property="VerticalAlignment" Value="Stretch" />
-    <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
-    <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
+    <Setter Property="VerticalContentAlignment" Value="Stretch" />
+    <Setter Property="HorizontalContentAlignment" Value="Stretch" />
     <Setter Property="FocusVisualStyle" Value="{DynamicResource DefaultControlFocusVisualStyle}" />
     <Setter Property="KeyboardNavigation.IsTabStop" Value="True" />
     <Setter Property="Focusable" Value="True" />
diff --git a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Light.xaml b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Light.xaml
index e13346c33a2..338de7aef6b 100644
--- a/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Light.xaml
+++ b/src/Microsoft.DotNet.Wpf/src/Themes/PresentationFramework.Fluent/Themes/Fluent.Light.xaml
@@ -4035,8 +4035,8 @@
     <Setter Property="BorderBrush" Value="Transparent" />
     <Setter Property="HorizontalAlignment" Value="Stretch" />
     <Setter Property="VerticalAlignment" Value="Stretch" />
-    <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
-    <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
+    <Setter Property="VerticalContentAlignment" Value="Stretch" />
+    <Setter Property="HorizontalContentAlignment" Value="Stretch" />
     <Setter Property="FocusVisualStyle" Value="{DynamicResource DefaultControlFocusVisualStyle}" />
     <Setter Property="KeyboardNavigation.IsTabStop" Value="True" />
     <Setter Property="Focusable" Value="True" />