diff --git a/ctf_flag/init.lua b/ctf_flag/init.lua
index 5484e42..893955e 100644
--- a/ctf_flag/init.lua
+++ b/ctf_flag/init.lua
@@ -6,16 +6,23 @@ ctf.register_on_init(function()
 	ctf._set("flag.names",                 true)
 	ctf._set("flag.waypoints",             true)
 	ctf._set("flag.protect_distance",      25)
+	ctf._set("flag.nobuild_radius",        3)
 	ctf._set("flag.capture_mode",          "take")
 	ctf._set("gui.team.teleport_to_flag",  true)
 	ctf._set("gui.team.teleport_to_spawn", false)
 end)
 
+dofile(minetest.get_modpath("ctf_flag") .. "/hud.lua")
+dofile(minetest.get_modpath("ctf_flag") .. "/gui.lua")
+dofile(minetest.get_modpath("ctf_flag") .. "/flag_func.lua")
+dofile(minetest.get_modpath("ctf_flag") .. "/api.lua")
+dofile(minetest.get_modpath("ctf_flag") .. "/flags.lua")
+
 ctf.register_on_new_team(function(team)
 	team.flags = {}
 end)
 
-ctf.register_on_territory_query(function(pos)
+function ctf_flag.get_nearest(pos)
 	local closest = nil
 	local closest_team = nil
 	local closest_distSQ = 1000000
@@ -34,7 +41,9 @@ ctf.register_on_territory_query(function(pos)
 	end
 
 	return closest_team, closest_distSQ
-end)
+end
+
+ctf.register_on_territory_query(ctf_flag.get_nearest)
 
 function ctf.get_spawn(team)
 	if not ctf.team(team) then
@@ -54,8 +63,21 @@ function ctf.get_spawn(team)
 	end
 end
 
-dofile(minetest.get_modpath("ctf_flag") .. "/hud.lua")
-dofile(minetest.get_modpath("ctf_flag") .. "/gui.lua")
-dofile(minetest.get_modpath("ctf_flag") .. "/flag_func.lua")
-dofile(minetest.get_modpath("ctf_flag") .. "/api.lua")
-dofile(minetest.get_modpath("ctf_flag") .. "/flags.lua")
+-- Add minimum build range
+local old_is_protected = minetest.is_protected
+local r = ctf.setting("flag.nobuild_radius")
+local rs = r * r
+function minetest.is_protected(pos, name)
+	if rs == 0 then
+		return old_is_protected(pos, name)
+	end
+
+	local tname, distsq = ctf_flag.get_nearest(pos)
+	if distsq < rs then
+		minetest.chat_send_player(name,
+			"Too close to the flag! You need to be at least " .. r .. " nodes away.")
+		return true
+	else
+		return old_is_protected(pos, name)
+	end
+end