diff --git a/Source/OpenTK/IGameWindow.cs b/Source/OpenTK/IGameWindow.cs
index 78a794de..e838522f 100644
--- a/Source/OpenTK/IGameWindow.cs
+++ b/Source/OpenTK/IGameWindow.cs
@@ -34,7 +34,7 @@ namespace OpenTK.Platform
     /// <summary>
     /// Defines the interface for a GameWindow.
     /// </summary>
-    interface IGameWindow : INativeWindow
+    public interface IGameWindow : INativeWindow
     {
         /// <summary>
         /// Enters the game loop of the GameWindow using the maximum update rate.