diff --git a/mesecons_materials/init.lua b/mesecons_materials/init.lua
index d16e866..5ebf605 100644
--- a/mesecons_materials/init.lua
+++ b/mesecons_materials/init.lua
@@ -35,7 +35,7 @@ minetest.register_craftitem("mesecons_materials:silicon", {
 minetest.register_craft({
 	output = "mesecons_materials:silicon 4",
 	recipe = {
-		{"default:sand", "default:sand"},
-		{"default:sand", "default:steel_ingot"},
+		{"group:sand", "group:sand"},
+		{"group:sand", "default:steel_ingot"},
 	}
 })