diff --git a/Tools.ps1 b/Tools.ps1
index be5b1c2..69c5ac3 100644
--- a/Tools.ps1
+++ b/Tools.ps1
@@ -126,7 +126,7 @@ param(
     [string]$Arguments='null',
     [Parameter(Mandatory=$false,ParameterSetName='live-ps')]
     [Parameter(Mandatory=$false,ParameterSetName='local')]
-    [System.Collections.ArrayList]$HaltIfRunning
+    [string[]]$HaltIfRunning
 )
 $LogName = $MyInvocation.MyCommand
 If ( $Arguments -eq "null" ) { $Arguments = $null }