diff --git a/devops-service/db/mongo/models/stack/stack_ec2.rb b/devops-service/db/mongo/models/stack/stack_ec2.rb
index 693b9d2..a3cff24 100644
--- a/devops-service/db/mongo/models/stack/stack_ec2.rb
+++ b/devops-service/db/mongo/models/stack/stack_ec2.rb
@@ -1,7 +1,12 @@
 module Devops
   module Model
     class StackEc2 < StackBase
-      self.provider = 'ec2'
+
+      def initialize attr={}
+        self.provider = 'ec2'
+        super(attr)
+      end
+
     end
   end
 end
diff --git a/devops-service/db/mongo/models/stack/stack_openstack.rb b/devops-service/db/mongo/models/stack/stack_openstack.rb
index 13818d9..3da2e86 100644
--- a/devops-service/db/mongo/models/stack/stack_openstack.rb
+++ b/devops-service/db/mongo/models/stack/stack_openstack.rb
@@ -1,7 +1,11 @@
 module Devops
   module Model
     class StackOpenstack < StackBase
-      self.provider = 'openstack'
+
+      def initialize attr={}
+        self.provider = 'openstack'
+        super(attr)
+      end
 
       def stack_status
         details[:stack_status] || details['stack_status'] if details