diff --git a/pyvcloud/vcd/vm.py b/pyvcloud/vcd/vm.py
index acb2d2a4..331b98e7 100644
--- a/pyvcloud/vcd/vm.py
+++ b/pyvcloud/vcd/vm.py
@@ -1568,8 +1568,13 @@ def update_guest_customization_section(self, enabled=None,
             gc_section.ResetPasswordRequired = E.ResetPasswordRequired(
                 reset_password_required)
         if customization_script is not None:
-            gc_section.CustomizationScript = E.CustomizationScript(
-                customization_script)
+            cs = E.CustomizationScript(customization_script)
+            if hasattr(gc_section, "CustomizationScript"):
+                gc_section.CustomizationScript = cs
+            elif hasattr(gc_section, "ComputerName"):
+                gc_section.ComputerName.addprevious(cs)
+            else:
+                gc_section.Link.addprevious(cs)
 
         return self.client. \
             put_resource(uri, gc_section,