diff --git a/mods/external_legacy/init.lua b/mods/external_legacy/init.lua
index 2160f3ee..4ac90683 100644
--- a/mods/external_legacy/init.lua
+++ b/mods/external_legacy/init.lua
@@ -9,6 +9,7 @@ minetest.register_alias("moreores:gold_ingot", "default:gold_ingot")
 minetest.register_alias("moreores:mineral_copper", "default:stone_with_copper")
 minetest.register_alias("moreores:copper_lump", "default:copper_lump")
 minetest.register_alias("moreores:copper_ingot", "default:copper_ingot")
+minetest.register_alias("moreores:copper_block", "default:copperblock")
 minetest.register_alias("moreores:bronze_ingot", "default:bronze_ingot")
 minetest.register_alias("moreores:bronze_block", "default:bronzeblock")