diff --git a/src/Avalonia.FreeDesktop/DBusFileChooser.cs b/src/Avalonia.FreeDesktop/DBusFileChooser.cs
index 996f5dfe86..24db614a02 100644
--- a/src/Avalonia.FreeDesktop/DBusFileChooser.cs
+++ b/src/Avalonia.FreeDesktop/DBusFileChooser.cs
@@ -8,7 +8,7 @@ using Tmds.DBus;
 namespace Avalonia.FreeDesktop
 {
     [DBusInterface("org.freedesktop.portal.FileChooser")]
-    public interface IFileChooser : IDBusObject
+    internal interface IFileChooser : IDBusObject
     {
         Task<ObjectPath> OpenFileAsync(string ParentWindow, string Title, IDictionary<string, object> Options);
         Task<ObjectPath> SaveFileAsync(string ParentWindow, string Title, IDictionary<string, object> Options);
@@ -20,12 +20,12 @@ namespace Avalonia.FreeDesktop
     }
 
     [Dictionary]
-    public class FileChooserProperties
+    internal class FileChooserProperties
     {
         public uint Version { get; set; }
     }
 
-    public static class FileChooserExtensions
+    internal static class FileChooserExtensions
     {
         public static Task<uint> GetVersionAsync(this IFileChooser o) => o.GetAsync<uint>("version");
     }
diff --git a/src/Avalonia.FreeDesktop/DBusSystemDialog.cs b/src/Avalonia.FreeDesktop/DBusSystemDialog.cs
index d76e22b113..88f3e528e5 100644
--- a/src/Avalonia.FreeDesktop/DBusSystemDialog.cs
+++ b/src/Avalonia.FreeDesktop/DBusSystemDialog.cs
@@ -9,11 +9,11 @@ using Tmds.DBus;
 
 namespace Avalonia.FreeDesktop
 {
-    public class DBusSystemDialog : ISystemDialogImpl
+    internal class DBusSystemDialog : ISystemDialogImpl
     {
         private readonly IFileChooser _fileChooser;
 
-        public DBusSystemDialog()
+        internal DBusSystemDialog()
         {
             _fileChooser = DBusHelper.Connection.CreateProxy<IFileChooser>("org.freedesktop.portal.Desktop", "/org/freedesktop/portal/desktop");
         }