diff --git a/OpenRA.Mods.RA/Render/RenderSprites.cs b/OpenRA.Mods.RA/Render/RenderSprites.cs
index f93507498b..6815c66575 100644
--- a/OpenRA.Mods.RA/Render/RenderSprites.cs
+++ b/OpenRA.Mods.RA/Render/RenderSprites.cs
@@ -89,7 +89,7 @@ namespace OpenRA.Mods.RA.Render
 		public static string GetImage(ActorInfo actor)
 		{
 			var Info = actor.Traits.Get<RenderSpritesInfo>();
-			return Info.Image ?? actor.Name;
+			return (Info.Image ?? actor.Name).ToLowerInvariant();
 		}
 
 		public string GetImage(Actor self)