diff --git a/Source/Editor/Viewport/PrefabWindowViewport.cs b/Source/Editor/Viewport/PrefabWindowViewport.cs
index 1b66b8c95..d59ebb977 100644
--- a/Source/Editor/Viewport/PrefabWindowViewport.cs
+++ b/Source/Editor/Viewport/PrefabWindowViewport.cs
@@ -26,6 +26,7 @@ namespace FlaxEditor.Viewport
     /// <seealso cref="IGizmoOwner" />
     public class PrefabWindowViewport : PrefabPreview, IEditorPrimitivesOwner
     {
+        [HideInEditor]
         private sealed class PrefabSpritesRenderer : MainEditorGizmoViewport.EditorSpritesRenderer
         {
             public PrefabWindowViewport Viewport;