diff --git a/portas/portas/api/v1/webservers.py b/portas/portas/api/v1/webservers.py
index ddc73c3..b0e2356 100644
--- a/portas/portas/api/v1/webservers.py
+++ b/portas/portas/api/v1/webservers.py
@@ -36,7 +36,7 @@ class Controller(object):
         for unit in webServer['units']:
             unit_count += 1
             unit['id'] = uuidutils.generate_uuid()
-            unit['name'] = 'iis{0}'.format(unit_count)
+            unit['name'] = webServer['name'] + '_instance_' + str(unit_count)
 
         draft = prepare_draft(draft)
         draft['services']['webServers'].append(webServer)