diff --git a/mogan_ui/content/servers/workflows/create_server.py b/mogan_ui/content/servers/workflows/create_server.py
index 6e2d6e6..82fbf3e 100644
--- a/mogan_ui/content/servers/workflows/create_server.py
+++ b/mogan_ui/content/servers/workflows/create_server.py
@@ -365,6 +365,8 @@ class LaunchServer(workflows.Workflow):
             nics = None
 
         avail_zone = context.get('availability_zone', None)
+        if not avail_zone:
+            avail_zone = None
 
         try:
             mogan.server_create(request,