diff --git a/OpenRA.Game/Graphics/WorldRenderer.cs b/OpenRA.Game/Graphics/WorldRenderer.cs
index ed9b1dd7f5..273016e3c8 100644
--- a/OpenRA.Game/Graphics/WorldRenderer.cs
+++ b/OpenRA.Game/Graphics/WorldRenderer.cs
@@ -185,7 +185,8 @@ namespace OpenRA.Graphics
 				.Concat(aboveShroudSelected)
 				.Concat(aboveShroudEffects)
 				.Concat(aboveShroudOrderGenerator)
-				.Select(r => r.PrepareRender(this));
+				.Select(r => r.PrepareRender(this))
+				.ToList();
 			Game.Renderer.WorldVoxelRenderer.EndFrame();
 
 			// HACK: Keep old grouping behaviour