diff --git a/src/Avalonia.Controls.DataGrid/Utils/DataGridHelper.cs b/src/Avalonia.Controls.DataGrid/Utils/DataGridHelper.cs
index d553a82fa0..2cf41082ca 100644
--- a/src/Avalonia.Controls.DataGrid/Utils/DataGridHelper.cs
+++ b/src/Avalonia.Controls.DataGrid/Utils/DataGridHelper.cs
@@ -1,6 +1,6 @@
 namespace Avalonia.Controls
 {
-    public static class DataGridHelper
+    internal static class DataGridHelper
     {
         internal static void SyncColumnProperty<T>(AvaloniaObject column, AvaloniaObject content, AvaloniaProperty<T> property)
         {