diff --git a/mods/default/mapgen.lua b/mods/default/mapgen.lua
index c92514cf..c918229c 100644
--- a/mods/default/mapgen.lua
+++ b/mods/default/mapgen.lua
@@ -2,7 +2,6 @@
 -- Aliases for map generator outputs
 --
 
-minetest.register_alias("mapgen_air", "air")
 minetest.register_alias("mapgen_stone", "default:stone")
 minetest.register_alias("mapgen_dirt", "default:dirt")
 minetest.register_alias("mapgen_dirt_with_grass", "default:dirt_with_grass")