diff --git a/scripts/Common/Scripts/Scripting.ps1 b/scripts/Common/Scripts/Scripting.ps1
index b9b0ebbb..e508d405 100644
--- a/scripts/Common/Scripts/Scripting.ps1
+++ b/scripts/Common/Scripts/Scripting.ps1
@@ -33,11 +33,19 @@ function ConvertTo-Injection {
 #>
 function Write-PSScript {
     param(
-        [string] $FileName,
-        [string] $Script,
+        [Parameter(Mandatory=$true)]
+        [Parameter(ParameterSetName="Common")]
         [Parameter(ParameterSetName="Replace")]
-        [switch] $Replace,
         [Parameter(ParameterSetName="Append")]
+        [string] $FileName,
+        [Parameter(Mandatory=$true)]
+        [Parameter(ParameterSetName="Common")]
+        [Parameter(ParameterSetName="Replace")]
+        [Parameter(ParameterSetName="Append")]
+        [string] $Script,
+        [Parameter(ParameterSetName="Replace", Mandatory=$true)]
+        [switch] $Replace,
+        [Parameter(ParameterSetName="Append", Mandatory=$true)]
         [switch] $Append
     )