diff --git a/RO-plugin/osm_ro_plugin/vimconn.py b/RO-plugin/osm_ro_plugin/vimconn.py
index f5fe6cc..3178953 100644
--- a/RO-plugin/osm_ro_plugin/vimconn.py
+++ b/RO-plugin/osm_ro_plugin/vimconn.py
@@ -636,6 +636,7 @@
         disk_list=None,
         availability_zone_index=None,
         availability_zone_list=None,
+        security_group_name=None,
     ):
         """Adds a VM instance to VIM
         Params: