diff --git python/samba/dbchecker.py python/samba/dbchecker.py

index 0085b4a8515..1030a1e553d 100644

--- python/samba/dbchecker.py

+++ python/samba/dbchecker.py

@@ -131,7 +131,8 @@ class dbcheck(object):

         self.link_id_cache = {}

         self.name_map = {}

         try:

-            res = samdb.search(base="CN=DnsAdmins,CN=Users,%s" % samdb.domain_dn(), scope=ldb.SCOPE_BASE,

+            res = samdb.search(base="%s" % samdb.domain_dn(), scope=ldb.SCOPE_SUBTREE,

+                               expression="(&(CN=DnsAdmins)(objectClass=group))",

                                attrs=["objectSid"])

             dnsadmins_sid = ndr_unpack(security.dom_sid, res[0]["objectSid"][0])

             self.name_map['DnsAdmins'] = str(dnsadmins_sid)