diff --git a/osm_ro/vimconn_openvim.py b/osm_ro/vimconn_openvim.py
index e722dc8..abfffbe 100644
--- a/osm_ro/vimconn_openvim.py
+++ b/osm_ro/vimconn_openvim.py
@@ -785,7 +785,8 @@
             #print text
             return -vim_response.status_code,text
 
-    def new_vminstance(self,name,description,start,image_id,flavor_id,net_list, cloud_config=None, disk_list=None):
+    def new_vminstance(self, name, description, start, image_id, flavor_id, net_list, cloud_config=None, disk_list=None,
+                       availability_zone_index=None, availability_zone_list=None):
         '''Adds a VM instance to VIM
         Params:
             start: indicates if VM must start or boot in pause mode. Ignored