diff --git a/scripts/Update-OvfConfiguration.ps1 b/scripts/Update-OvfConfiguration.ps1
index 68f1ae3..a15f107 100644
--- a/scripts/Update-OvfConfiguration.ps1
+++ b/scripts/Update-OvfConfiguration.ps1
@@ -116,13 +116,13 @@ ForEach ($DynamicDisk in $OVFConfig.Disks.Dynamic) {
         }
     }
     $XMLDiskAttrUnits.Value = "byte * 2^$($Powers)"
-    $XMLDiskAttrFormat.CreateAttribute('format', $XML.DocumentElement.ovf)
+    $XMLDiskAttrFormat = $XML.CreateAttribute('format', $XML.DocumentElement.ovf)
     $XMLDiskAttrFormat.Value = 'http://www.vmware.com/interfaces/specifications/vmdk.html#streamOptimized'
-    $XMLDiskId.CreateAttribute('diskId', $XML.DocumentElement.ovf)
+    $XMLDiskId = $XML.CreateAttribute('diskId', $XML.DocumentElement.ovf)
     $XMLDiskId.Value = "vmdisk$($DiskId)"
-    $XMLDiskAttrCapacity.CreateAttribute('capacity', $XML.DocumentElement.ovf)
+    $XMLDiskAttrCapacity = $XML.CreateAttribute('capacity', $XML.DocumentElement.ovf)
     $XMLDiskAttrCapacity.Value = '${{vmconfig.disksize.{0}}}' -f $DiskId
-    $XMLDiskAttrPopulated.CreateAttribute('populatedSize', $XML.DocumentElement.ovf)
+    $XMLDiskAttrPopulated = $XML.CreateAttribute('populatedSize', $XML.DocumentElement.ovf)
     $XMLDiskAttrPopulated.Value = 0
 
     [void]$XMLDisk.Attributes.Append($XMLDiskAttrUnits)