diff --git a/Femto-DS/Femto.py b/Femto-DS/Femto.py
index 81c3dbc0089524e98eef46f299d5d2be55989727..9d2a6a3840c1848a59934d1f73610763ea7c4e64 100644
--- a/Femto-DS/Femto.py
+++ b/Femto-DS/Femto.py
@@ -104,7 +104,7 @@ class Femto(Device):
             self.client.connect()
             self.client.load_type_definitions()
             objects = self.client.get_objects_node()
-            idx = self.client.get_namespace_index(DEFAULT_URI)
+            idx = self.client.get_namespace_index("http://lofar.eu")
 
             # Now getting a variable node using its browse path
             self.opc_obj = self.client.get_root_node().get_child(["0:Objects",