diff --git a/miner.lua b/miner.lua
index b89033e..21dd131 100644
--- a/miner.lua
+++ b/miner.lua
@@ -166,7 +166,7 @@ local function mineProcedure()
   end
 
   -- 2. Check
-  if robotState.x == MAX_X and robotState.y == MAX_Y and robotState.z == MAX_Z then
+  if robotState.x == MAX_X and robotState.y == MAX_Y and robotState.z == 0 then
     miner.finished = true
     miner.mission = 'return-home'
     miner.lastPositionState = miner.robot.getState()