diff --git a/inventory_provider/tasks/worker.py b/inventory_provider/tasks/worker.py
index e1493340ee181356384107eddc691054a8bb815b..d0613236b21c8b987a92b94a878751ea14f7a9c4 100644
--- a/inventory_provider/tasks/worker.py
+++ b/inventory_provider/tasks/worker.py
@@ -199,7 +199,7 @@ def update_interfaces_to_services(self):
     rp.execute()
 
 
-def _unmanaged_interfaces(self):
+def _unmanaged_interfaces():
 
     def _convert(d):
         # the config file keys are more readable than