diff --git a/maps/territorial_control.lua b/maps/territorial_control.lua
index fe8559a5..ab60e4c0 100644
--- a/maps/territorial_control.lua
+++ b/maps/territorial_control.lua
@@ -445,7 +445,9 @@ end
 
 local function on_player_changed_position(event)
 	local player = game.players[event.player_index]
-	uncover_map_for_player(player)
+	if player.surface.index == 4 then
+		uncover_map_for_player(player)
+	end
 end
 
 local function generate_spawn_area(position_left_top)				
@@ -610,4 +612,4 @@ event.add(defines.events.on_player_mined_entity, on_player_mined_entity)
 event.add(defines.events.on_entity_died, on_entity_died)
 event.add(defines.events.on_chunk_generated, on_chunk_generated)
 event.add(defines.events.on_player_changed_position, on_player_changed_position)
-event.add(defines.events.on_player_joined_game, on_player_joined_game)
\ No newline at end of file
+event.add(defines.events.on_player_joined_game, on_player_joined_game)