diff --git a/static/install-opentofu.ps1 b/static/install-opentofu.ps1
index 26ce059..5da840b 100755
--- a/static/install-opentofu.ps1
+++ b/static/install-opentofu.ps1
@@ -355,7 +355,7 @@ function installStandalone() {
     logInfo "Downloading OpenTofu version ${opentofuVersion}..."
 
     $tempPath = tempdir
-    if ((Get-CimInstance Win32_operatingsystem).OSArchitecture -eq "64-bit") {
+    if ([Environment]::Is64BitOperatingSystem) {
         $arch = "amd64"
     } else {
         $arch = "386"