diff --git a/organize/member.py b/organize/member.py
index 88428aa..ab2aded 100644
--- a/organize/member.py
+++ b/organize/member.py
@@ -80,8 +80,8 @@ class MemberRegistrationManager(object):
             pfName = options(self.principalfolder_key,
                              (self.default_principalfolder,))[0]
         self.createPrincipal(pfName, userId, password, lastName, firstName, 
-                                    useExisting=useExisting)
-        if len(groups)==0:
+                             useExisting=useExisting)
+        if not groups:
             groups = options(self.groups_key, ())
         self.setGroupsForPrincipal(pfName, userId,  groups=groups)
         return self.createPersonForPrincipal(pfName, userId, lastName, firstName,