diff --git a/scripts/windows_agent_start.ps1 b/scripts/windows_agent_start.ps1
index cdb9e86..86deec8 100644
--- a/scripts/windows_agent_start.ps1
+++ b/scripts/windows_agent_start.ps1
@@ -19,7 +19,6 @@
 
 param(
     [Parameter(Mandatory=$true)]
-    [ValidateSet("buildkite", "jenkins")]
     [string]$master
 )