diff --git a/mods/mapgen/init.lua b/mods/mapgen/init.lua
index 483bf3b7..6c217a08 100644
--- a/mods/mapgen/init.lua
+++ b/mods/mapgen/init.lua
@@ -9,9 +9,9 @@ end)
 
 dofile(minetest.get_modpath("mapgen").."/mapgen.lua")
 
-minetest.register_alias("mapgen_water_source", "mapgen:vacuum")
+minetest.register_alias("mapgen_water_source", "moontest:vacuum")
 minetest.register_alias("mapgen_lava_source", "default:lava_source")
-minetest.register_alias("mapgen_stone", "mapgen:stone")
-minetest.register_alias("mapgen_dirt", "mapgen:compressed_dust")
+minetest.register_alias("mapgen_stone", "moontest:stone")
+minetest.register_alias("mapgen_dirt", "moontest:compressed_dust")
 minetest.register_alias("mapgen_dirt_with_grass", "air")