diff --git a/OpenRA.Mods.RA/Modifiers/HiddenUnderFog.cs b/OpenRA.Mods.RA/Modifiers/HiddenUnderFog.cs
index 7d098af3b8..843407085b 100644
--- a/OpenRA.Mods.RA/Modifiers/HiddenUnderFog.cs
+++ b/OpenRA.Mods.RA/Modifiers/HiddenUnderFog.cs
@@ -1,6 +1,6 @@
 #region Copyright & License Information
 /*
- * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * Copyright 2007-2013 The OpenRA Developers (see AUTHORS)
  * This file is part of OpenRA, which is free software. It is made
  * available to you under the terms of the GNU General Public License
  * as published by the Free Software Foundation. For more information,
@@ -15,19 +15,18 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
 {
-	class HiddenUnderFogInfo : TraitInfo<HiddenUnderFog> {}
+	public class HiddenUnderFogInfo : TraitInfo<HiddenUnderFog> { }
 
-	class HiddenUnderFog : IRenderModifier, IVisibilityModifier
+	public class HiddenUnderFog : IRenderModifier, IVisibilityModifier
 	{
 		public bool IsVisible(Actor self, Player byPlayer)
 		{
 			return byPlayer == null || Shroud.GetVisOrigins(self).Any(o => byPlayer.Shroud.IsVisible(o));
 		}
 
-		static IRenderable[] Nothing = { };
 		public IEnumerable<IRenderable> ModifyRender(Actor self, WorldRenderer wr, IEnumerable<IRenderable> r)
 		{
-			return IsVisible(self, self.World.RenderPlayer) ? r : Nothing;
+			return IsVisible(self, self.World.RenderPlayer) ? r : SpriteRenderable.None;
 		}
 	}
 }