diff --git a/auto-ks.py b/auto-ks.py
index a603da5864d991d6429adcb9d657d16e78e93f1d..2ab02eacc37c61c40a49593f1d10acf7ca7df932 100755
--- a/auto-ks.py
+++ b/auto-ks.py
@@ -87,7 +87,10 @@ def main():
     inter_url = "{server}/inter/{yn}".format(yn=inter_yn, server=cal_server)
     json_dcc_url  = "{server}/dcc/{yn}".format(yn=inter_yn, server=cal_server)
     latex_url = "{server}/cer/latex/{cer_doc}".format(server=cal_server, cer_doc=cer_doc)
-    db_url = 'http://{usr}:{pwd}@{srv}:5984/'.format(srv=dbsrv, usr=usr, pwd=pwd)
+    if usr:
+        db_url = 'http://{usr}:{pwd}@{srv}:5984/'.format(srv=dbsrv, usr=usr, pwd=pwd)
+    else:
+        db_url = 'http://{srv}:5984/'.format(srv=dbsrv)
     dcc_url = "{server}/vl-dcc/{yn}".format(server=xml_gen_server, yn=yn)
     valid_url = "{server}/validate".format(server=xml_valid_server)