diff --git a/run.py b/run.py
index 371c5b3d35e4aac147c6d7d88ed1dd5ceb7a9094..2caab65913fba56d97c7b8493294dd1a21dc4dfe 100644
--- a/run.py
+++ b/run.py
@@ -103,7 +103,7 @@ while True:
         #####################################################################
         # Compute the action for this step by using the previously 
         # defined controlle
-        action = my_controller(obs, number_of_agents)
+        action = my_controller(observation, number_of_agents)
 
         # Perform the chosen action on the environment.
         # The action gets applied to both the local and the remote copy