diff --git a/robotgame/level3.py b/robotgame/level3.py
index 49024b2..c7e8968 100644
--- a/robotgame/level3.py
+++ b/robotgame/level3.py
@@ -89,7 +89,7 @@ class Level3(level.Level):
         def update_wells(block):
             cur_boxes = []
             for block in action_blocks:
-                box = pos_colour.get((block.x / 64 - task_start[0],
+                box = pos_colour.get((block.x / 64 - task_start[0] - 1,
                                       block.y / 48 - task_start[1] - 1))
                 if box:
                     cur_boxes.append(box)