diff --git a/miner.lua b/miner.lua
index f4e9cd2..e6491a1 100644
--- a/miner.lua
+++ b/miner.lua
@@ -153,6 +153,8 @@ local function mineProcedure()
 
     miner.robot.down()
   elseif robotState.dir == 'FORWARD' and robotState.z < targetZ then
+    -- TODO: remove this print (debug purpose)
+    print(robotState.z, targetZ)
     turtleUtils.digAll()
     miner.robot.forward()
   elseif robotState.dir == 'FORWARD' and robotState.z == targetZ then