diff --git a/VERSION b/VERSION
index f73e45ea..346c410b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-Version 1.99.4 (2012-02-28 10:45:41) stable
+Version 1.99.4 (2012-02-28 10:47:48) stable
diff --git a/gluon/tools.py b/gluon/tools.py
index 91aedf05..e284e68b 100644
--- a/gluon/tools.py
+++ b/gluon/tools.py
@@ -2699,7 +2699,7 @@ class Auth(object):
                        dict(user_id=user_id, group_id=group_id))
         return id
 
-    def del_membership(self, group_id, user_id=None, role=None):
+    def del_membership(self, group_id=None, user_id=None, role=None):
         """
         revokes membership from group_id to user_id
         if user_id is None than user_id is that of current logged in user