diff --git a/samples/manage/azure-sql-db-managed-instance/prepare-subnet/prepareSubnet.ps1 b/samples/manage/azure-sql-db-managed-instance/prepare-subnet/prepareSubnet.ps1
index a7615c2b..ca22525f 100644
--- a/samples/manage/azure-sql-db-managed-instance/prepare-subnet/prepareSubnet.ps1
+++ b/samples/manage/azure-sql-db-managed-instance/prepare-subnet/prepareSubnet.ps1
@@ -12,7 +12,7 @@ function Ensure-Login ()
     If($context.Subscription -eq $null)
     {
         Write-Host "Loging in ..."
-        If((Login-AzureRmAccount -ErrorAction SilentlyContinue) -eq null)
+        If((Login-AzureRmAccount -ErrorAction SilentlyContinue) -eq $null)
         {
             Write-Host "Login failed: $_" -ForegroundColor Red
             Exit