diff --git a/worldedit/init.lua b/worldedit/init.lua
index 02c3494..1f16a5f 100644
--- a/worldedit/init.lua
+++ b/worldedit/init.lua
@@ -1,3 +1,5 @@
+assert(minetest.get_voxel_manip, string.rep(">", 300) .. "HEY YOU! YES, YOU OVER THERE. THIS VERSION OF WORLDEDIT REQUIRES MINETEST 0.4.8 OR LATER! YOU HAVE AN OLD VERSION." .. string.rep("<", 300))
+
 local path = minetest.get_modpath(minetest.get_current_modname())
 
 local loadmodule = function(path)