diff --git a/robotgame.py b/robotgame.py
index 145e314..dde222c 100755
--- a/robotgame.py
+++ b/robotgame.py
@@ -29,6 +29,7 @@ The main entrance point.
 from __future__ import print_function
 
 import sys
+import os
 import pygame
 
 # Initialise all Pygame modules