diff --git a/src/ContainerInstance/ContainerInstance.Autorest/custom/New-AzContainerGroup.ps1 b/src/ContainerInstance/ContainerInstance.Autorest/custom/New-AzContainerGroup.ps1
index 8a88c89cbeb8..c8c9454dc312 100644
--- a/src/ContainerInstance/ContainerInstance.Autorest/custom/New-AzContainerGroup.ps1
+++ b/src/ContainerInstance/ContainerInstance.Autorest/custom/New-AzContainerGroup.ps1
@@ -338,9 +338,13 @@ process {
       {
         $null = $PSBoundParameters.Add("IPAddressPort", $Container.Port)
       }
-      
-
 
+      if(!$PSBoundParameters.ContainsKey("StandbyPoolProfileId")) {
+        if(!$PSBoundParameters.ContainsKey("OSType")) {
+          $null = $PSBoundParameters.Add("OSType", "Linux")
+        }
+      }
+      
       Az.ContainerInstance.internal\New-AzContainerGroup @PSBoundParameters
     } catch {
         throw