diff --git a/scripts/Common/Scripts/Config.ps1 b/scripts/Common/Scripts/Config.ps1
index 93b0247c..526214a5 100644
--- a/scripts/Common/Scripts/Config.ps1
+++ b/scripts/Common/Scripts/Config.ps1
@@ -149,6 +149,8 @@ $null = New-Module {
         Gets the names of the users to create.
     #>
     function Get-Users {
+        [OutputType([string[]])]
+        param()
         Get-Attributes "valhalla.windows.users";
     }