diff --git a/trunk/daemon/core/session.py b/trunk/daemon/core/session.py
index dd8db197..f29f10b8 100644
--- a/trunk/daemon/core/session.py
+++ b/trunk/daemon/core/session.py
@@ -999,7 +999,7 @@ class SessionConfig(ConfigurableManager, Configurable):
          'Preserve session dir'),
         ("enablesdt", coreapi.CONF_DATA_TYPE_BOOL, '0', 'On,Off', 
          'Enable SDT3D output'),
-        ("sdturl", coreapi.CONF_DATA_TYPE_STRING, '', '',
+        ("sdturl", coreapi.CONF_DATA_TYPE_STRING, Sdt.DEFAULT_SDT_URL, '',
          'SDT3D URL'),
         ]
     _confgroups = "Options:1-%d" % len(_confmatrix)