diff --git a/plugins/modules/vultr_server.py b/plugins/modules/vultr_server.py
index b45a5ee..cc3a592 100644
--- a/plugins/modules/vultr_server.py
+++ b/plugins/modules/vultr_server.py
@@ -540,7 +540,7 @@ def _create_server(self, server=None):
                 'notify_activate': self.get_yes_or_no('notify_activate'),
                 'tag': self.module.params.get('tag'),
                 'reserved_ip_v4': self.module.params.get('reserved_ip_v4'),
-                'user_data': self.get_user_data(),
+                'userdata': self.get_user_data(),
                 'SCRIPTID': self.get_startup_script().get('SCRIPTID'),
             }
             self.api_query(