diff --git a/builder/frameworks/arduino.py b/builder/frameworks/arduino.py
index 4a6edd6..4da9fb5 100644
--- a/builder/frameworks/arduino.py
+++ b/builder/frameworks/arduino.py
@@ -22,6 +22,7 @@ kinds of creative coding, interactive objects, spaces or physical experiences.
 http://arduino.cc/en/Reference/HomePage
 """
 
+import os
 from os.path import join
 
 from SCons.Script import DefaultEnvironment, SConscript