diff --git a/tackerclient/v1_0/client.py b/tackerclient/v1_0/client.py
index 9a91ca16..4dee7fb4 100644
--- a/tackerclient/v1_0/client.py
+++ b/tackerclient/v1_0/client.py
@@ -467,10 +467,11 @@ class Client(ClientBase):
         for key in ('tenant_id', 'name'):
             if key in arg:
                 arg_[key] = arg[key]
+        arg_['attributes'] = {}
         if 'config' in arg:
-            arg_['attributes'] = {'config': arg['config']}
+            arg_['attributes']['config'] = arg['config']
         if 'param_values' in arg:
-            arg_['attributes'] = {'param_values': arg['param_values']}
+            arg_['attributes']['param_values'] = arg['param_values']
         body_ = {self._DEVICE: arg_}
         ret = self.create_device(body_)
         return {self._VNF: ret[self._DEVICE]}