diff --git a/src/Avalonia.Themes.Default/CalendarItem.xaml b/src/Avalonia.Themes.Default/CalendarItem.xaml
index a9756fdb5f..3d3d75a39a 100644
--- a/src/Avalonia.Themes.Default/CalendarItem.xaml
+++ b/src/Avalonia.Themes.Default/CalendarItem.xaml
@@ -27,7 +27,7 @@
                 </Grid.RowDefinitions>
                 <Grid.ColumnDefinitions>
                   <ColumnDefinition Width="Auto" />
-                  <ColumnDefinition Width="Auto" />
+                  <ColumnDefinition Width="*" />
                   <ColumnDefinition Width="Auto" />
                 </Grid.ColumnDefinitions>