--- /usr/share/foreman/app/models/operatingsystems/xenserver.rb.orig	2019-01-03 14:37:29.197743170 -0200
+++ /usr/share/foreman/app/models/operatingsystems/xenserver.rb	2019-01-03 14:37:47.082274770 -0200
@@ -2,6 +2,11 @@
   PXEFILES = {:kernel => "boot/vmlinuz", :initrd => "install.img", :xen => "boot/xen.gz"}
   MBOOT = "boot/pxelinux/mboot.c32"
 
+  # sets the prefix for the tfp files based on the os / arch combination
+  def pxe_prefix(medium_provider)
+    "boot/#{self}-x86_64".tr(" ", "-")
+  end
+
   def mediumpath(medium_provider)
     medium_provider.medium_uri.to_s
   end