diff --git a/python_payload/demo_worms.py b/python_payload/demo_worms.py
index 87a11a598923570a4308935f1f9acbb02aa7fa9b..f5d69264b89bf6bf1ff4b536c4c945c50bea4493 100644
--- a/python_payload/demo_worms.py
+++ b/python_payload/demo_worms.py
@@ -2,6 +2,7 @@ import hardware
 import random
 import time
 import math
+import event
 
 def xy_from_polar(r,deg):
     #rad = deg/180*math.pi