diff --git a/python/soma_workflow/start_workflow_engine.py b/python/soma_workflow/start_workflow_engine.py
index db8d870c..e8df1712 100644
--- a/python/soma_workflow/start_workflow_engine.py
+++ b/python/soma_workflow/start_workflow_engine.py
@@ -96,9 +96,7 @@ def __init__(self,
     class LocalSchedulerCfg(Pyro.core.ObjBase,
                             soma_workflow.configuration.LocalSchedulerCfg):
 
-        def __init__(self,
-                     proc_nb=soma_workflow.configuration.default_cpu_number(),
-                     interval=1):
+        def __init__(self, proc_nb=0, interval=1, max_proc_nb=0):
             Pyro.core.ObjBase.__init__(self)
             soma_workflow.configuration.LocalSchedulerCfg.__init__(
                 self,