diff --git a/mods/default/player.lua b/mods/default/player.lua
index 5e8ad6f..9da8991 100644
--- a/mods/default/player.lua
+++ b/mods/default/player.lua
@@ -3,10 +3,17 @@ local player_lastsound = {}
 local player_health = {}
 
 local function step(dtime)
-   for _,player in ipairs(minetest.get_connected_players()) do
+   for _, player in ipairs(minetest.get_connected_players()) do
       local player_pos=player:getpos()
       local name=player:get_player_name()
 
+      if player_pos.x < -30000 or player_pos.x > 30000
+	 or player_pos.y < -30000 or player_pos.y > 30000
+	 or player_pos.z < -30000 or player_pos.z > 30000 then
+	 minetest.chat_send_player(name, "Don't go past 30000m in any direction!")
+	 player.set_hp(0)
+      end
+
       if player:get_hp() < player_health[name] then
 	 minetest.sound_play(
 	    "default_hurt",