diff --git a/luarules/gadgets/game_boombox_spawner.lua b/luarules/gadgets/game_boombox_spawner.lua
index fbcb1adde5e..6080bbeb780 100644
--- a/luarules/gadgets/game_boombox_spawner.lua
+++ b/luarules/gadgets/game_boombox_spawner.lua
@@ -67,7 +67,7 @@ function gadget:GameFrame(frame)
             if math.random(1,10) == 1 then 
                 for j = 1,1000 do
                     local posx = math.random(math.floor(Game.mapSizeX*0.02), math.ceil(Game.mapSizeX*0.98))
-                    local posz = math.random(math.floor(Game.mapSizeX*0.02), math.ceil(Game.mapSizeX*0.98))
+                    local posz = math.random(math.floor(Game.mapSizeZ*0.02), math.ceil(Game.mapSizeZ*0.98))
                     local posy = Spring.GetGroundHeight(posx, posz)
                     local blockerDistance = getNearestBlocker(posx, posz)
                     if posy > 0 and positionCheckLibrary.FlatAreaCheck(posx, posy, posz, 64, 25, true) and blockerDistance > 196 then