diff --git a/lib/jss/api_object/group.rb b/lib/jss/api_object/group.rb
index ef07c9da..1a617f9b 100644
--- a/lib/jss/api_object/group.rb
+++ b/lib/jss/api_object/group.rb
@@ -458,6 +458,7 @@ def rest_xml
       group.add_element('is_smart').text = @is_smart
       if @is_smart
         group << @criteria.rest_xml if @criteria
+        group.add_element('computers').text = nil
       else
         group << self.class::MEMBER_CLASS.xml_list(@members, :id)
       end