diff --git a/src/command_modules/azure-cli-acs/azure/cli/command_modules/acs/_params.py b/src/command_modules/azure-cli-acs/azure/cli/command_modules/acs/_params.py
index 0cd41409018..2581feba7a4 100644
--- a/src/command_modules/azure-cli-acs/azure/cli/command_modules/acs/_params.py
+++ b/src/command_modules/azure-cli-acs/azure/cli/command_modules/acs/_params.py
@@ -58,7 +58,7 @@ def _get_default_install_location(exe_name):
 register_cli_argument('acs', 'name', arg_type=name_arg_type, help='ACS cluster name', completer=get_resource_name_completion_list('Microsoft.ContainerService/ContainerServices'))
 register_cli_argument('acs', 'resource_group', arg_type=resource_group_name_type)
 
-register_cli_argument('acs', 'orchestrator_type', **enum_choice_list(ContainerServiceOchestratorTypes))
+register_cli_argument('acs', 'orchestrator_type', options_list=('--orchestrator-type', '-t'), **enum_choice_list(ContainerServiceOchestratorTypes))
 # some admin names are prohibited in acs, such as root, admin, etc. Because we have no control on the orchestrators, so default to a safe name.
 register_cli_argument('acs', 'admin_username', options_list=('--admin-username',), default='azureuser', required=False)
 register_cli_argument('acs', 'dns_name_prefix', options_list=('--dns-prefix', '-d'))