diff --git a/vhdbuilder/packer/windows/windows-vhd-configuration.ps1 b/vhdbuilder/packer/windows/windows-vhd-configuration.ps1
index f46c8a84755..818d504194e 100644
--- a/vhdbuilder/packer/windows/windows-vhd-configuration.ps1
+++ b/vhdbuilder/packer/windows/windows-vhd-configuration.ps1
@@ -27,12 +27,11 @@ $CPU_ARCH = switch ($cpu.Architecture) {
 
 Write-Output ($cpu | ConvertTo-Json)
 
-if ([string]::IsNullOrEmpty($windowsVersion.previousLatestVersion)) {
+if ([string]::IsNullOrEmpty($CPU_ARCH)) {
     Write-Output "Unknown architecture for CPU ${cpu.Name} with arch ${cpu.Architecture}"
     throw "Unsupported architecture for SKU $windowsSKU for CPU ${cpu.Name} with arch ${cpu.Architecture}"
 }
 
-
 $HelpersFile = "c:/k/components_json_helpers.ps1"
 $ComponentsJsonFile = "c:/k/components.json"
 $WindowsSettingsFile = "c:/k/windows_settings.json"