diff --git a/LdapServer.py b/LdapServer.py
index a2878d5..c12100b 100644
--- a/LdapServer.py
+++ b/LdapServer.py
@@ -64,7 +64,7 @@ class LdapServer(object):
 			return ldap.SCOPE_SUBTREE
 		raise Exception("Unknown LDAP scope '%s'" % scope)
 
-	def search(self, basedn, filterstr, attrs, sizelimit=0, scope='sub'):
+	def search(self, basedn, filterstr='(objectClass=*)', attrs=[], sizelimit=0, scope='sub'):
 		res_id = self.con.search(basedn, self.get_scope(scope), filterstr, attrs)
 		ret = {}
 		c=0