diff --git a/OpenRA.Mods.Cnc/Traits/World/VoxelNormalsPalette.cs b/OpenRA.Mods.Cnc/Traits/World/VoxelNormalsPalette.cs
index 1311f41511..8de0bc71cf 100644
--- a/OpenRA.Mods.Cnc/Traits/World/VoxelNormalsPalette.cs
+++ b/OpenRA.Mods.Cnc/Traits/World/VoxelNormalsPalette.cs
@@ -59,7 +59,7 @@ namespace OpenRA.Mods.Cnc.Traits
 			wr.AddPalette(info.Name, new ImmutablePalette(data));
 		}
 
-		// Normal vector tables from http://www.sleipnirstuff.com/forum/viewtopic.php?t=8048
+		// Normal vector tables from https://web.archive.org/web/20041022134721/https://www.sleipnirstuff.com/forum/viewtopic.php?t=8048
 		static readonly float[] TSNormals =
 		{
 			0.671214f,  0.198492f, -0.714194f,