diff --git a/src/Avalonia.Base/Input/FocusManager.cs b/src/Avalonia.Base/Input/FocusManager.cs
index 4c464a44ae..da84a3272f 100644
--- a/src/Avalonia.Base/Input/FocusManager.cs
+++ b/src/Avalonia.Base/Input/FocusManager.cs
@@ -11,7 +11,7 @@ namespace Avalonia.Input
     /// <summary>
     /// Manages focus for the application.
     /// </summary>
-    [Unstable]
+    [PrivateApi]
     public class FocusManager : IFocusManager
     {
         /// <summary>
diff --git a/src/Avalonia.Base/Input/KeyboardDevice.cs b/src/Avalonia.Base/Input/KeyboardDevice.cs
index f6d2a2195a..a81bc6b2e0 100644
--- a/src/Avalonia.Base/Input/KeyboardDevice.cs
+++ b/src/Avalonia.Base/Input/KeyboardDevice.cs
@@ -7,7 +7,7 @@ using Avalonia.Metadata;
 
 namespace Avalonia.Input
 {
-    [Unstable]
+    [PrivateApi]
     public class KeyboardDevice : IKeyboardDevice, INotifyPropertyChanged
     {
         private IInputElement? _focusedElement;
diff --git a/src/Avalonia.Base/Input/MouseDevice.cs b/src/Avalonia.Base/Input/MouseDevice.cs
index 4aeffcdd72..f3e77433a9 100644
--- a/src/Avalonia.Base/Input/MouseDevice.cs
+++ b/src/Avalonia.Base/Input/MouseDevice.cs
@@ -12,7 +12,7 @@ namespace Avalonia.Input
     /// <summary>
     /// Represents a mouse device.
     /// </summary>
-    [Unstable]
+    [PrivateApi]
     public class MouseDevice : IMouseDevice, IDisposable
     {
         private int _clickCount;
diff --git a/src/Avalonia.Base/Input/PenDevice.cs b/src/Avalonia.Base/Input/PenDevice.cs
index b3cd39212b..832f32fb03 100644
--- a/src/Avalonia.Base/Input/PenDevice.cs
+++ b/src/Avalonia.Base/Input/PenDevice.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
 using Avalonia.Input.Raw;
+using Avalonia.Metadata;
 using Avalonia.Platform;
 #pragma warning disable CS0618
 
@@ -11,6 +12,7 @@ namespace Avalonia.Input
     /// <summary>
     /// Represents a pen/stylus device.
     /// </summary>
+    [PrivateApi]
     public class PenDevice : IPenDevice, IDisposable
     {
         private readonly Dictionary<long, Pointer> _pointers = new();
diff --git a/src/Avalonia.Base/Input/TouchDevice.cs b/src/Avalonia.Base/Input/TouchDevice.cs
index bab1b9f784..78b570da14 100644
--- a/src/Avalonia.Base/Input/TouchDevice.cs
+++ b/src/Avalonia.Base/Input/TouchDevice.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
 using Avalonia.Input.Raw;
+using Avalonia.Metadata;
 using Avalonia.Platform;
 #pragma warning disable CS0618
 
@@ -14,6 +15,7 @@ namespace Avalonia.Input
     /// <remarks>
     /// This class is supposed to be used on per-toplevel basis, don't use a shared one
     /// </remarks>
+    [PrivateApi]
     public class TouchDevice : IPointerDevice, IDisposable
     {
         private readonly Dictionary<long, Pointer> _pointers = new Dictionary<long, Pointer>();