diff --git a/src/Avalonia.Themes.Simple/Controls/TextBox.xaml b/src/Avalonia.Themes.Simple/Controls/TextBox.xaml
index 63da3cee44..3f06a33dc1 100644
--- a/src/Avalonia.Themes.Simple/Controls/TextBox.xaml
+++ b/src/Avalonia.Themes.Simple/Controls/TextBox.xaml
@@ -134,6 +134,8 @@
                               VerticalScrollBarVisibility="{TemplateBinding (ScrollViewer.VerticalScrollBarVisibility)}">
                   <Panel>
                     <TextBlock Name="watermark"
+                               HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
+                               VerticalAlignment="{TemplateBinding VerticalContentAlignment}"   
                                IsVisible="{TemplateBinding Text,
                                                            Converter={x:Static StringConverters.IsNullOrEmpty}}"
                                Opacity="0.5"