diff --git a/ClusterController/QstatParser.py b/ClusterController/QstatParser.py
index b95c623..c45b9db 100644
--- a/ClusterController/QstatParser.py
+++ b/ClusterController/QstatParser.py
@@ -40,6 +40,8 @@ class QstatParser:
 				queueMachineState += QueueMachineStateFlags.UNKNOWN
 			elif c == 'E':
 				queueMachineState += QueueMachineStateFlags.ERROR
+			elif c == 'o':
+				queueMachineState += QueueMachineStateFlags.OBSOLETE
 			else:
 				assert False, 'unhandled queue machine state flag :"' + c + '"'
 		return queueMachineState