diff --git a/pykick/striker.py b/pykick/striker.py
index 071dc9e..5cc9c66 100644
--- a/pykick/striker.py
+++ b/pykick/striker.py
@@ -273,6 +273,8 @@ class Striker(object):
 
     def ball_tracking(self, soll=0, tol=0.15):
         """Turn the robot to the ball, find the ball if cannot see it.
+        Call this until this returns True - then the robot is facing
+        the ball.
 
         Parameters
         ----------