diff --git a/src/Avalonia.Input/Cursor.cs b/src/Avalonia.Input/Cursor.cs
index 920b598eac..0c858aacdd 100644
--- a/src/Avalonia.Input/Cursor.cs
+++ b/src/Avalonia.Input/Cursor.cs
@@ -1,6 +1,8 @@
 using System;
 using Avalonia.Platform;
 
+#nullable enable
+
 namespace Avalonia.Input
 {
     /*
diff --git a/src/Avalonia.Input/Platform/IStandardCursorFactory.cs b/src/Avalonia.Input/Platform/IStandardCursorFactory.cs
index 51845cf03e..ede19e91b4 100644
--- a/src/Avalonia.Input/Platform/IStandardCursorFactory.cs
+++ b/src/Avalonia.Input/Platform/IStandardCursorFactory.cs
@@ -1,5 +1,7 @@
 using Avalonia.Input;
 
+#nullable enable
+
 namespace Avalonia.Platform
 {
     public interface IStandardCursorFactory