diff --git a/nova/compute/api.py b/nova/compute/api.py
index 67377df..be3eab3 100644
--- a/nova/compute/api.py
+++ b/nova/compute/api.py
@@ -928,6 +928,7 @@ class API(base.Base):
                                              'server_group_members',
                                              instance_group,
                                              context.user_id)
+                       count = count + i
                         try:
                             objects.Quotas.limit_check(context,
                                                server_group_members=count + 1)