Mount failure when loop kernel module is not loaded

gistfile1.txt

root@kchejzi5z568vxr:~# cat manifest.pp
mount { '/pl21474':
  ensure  => 'mounted',
  device  => '/tmp/pl21474',
  dump    => '0',
  fstype  => 'ext3',
  options => 'loop',
  pass    => '0',
  target  => '/etc/fstab',
} 
root@kchejzi5z568vxr:~# puppet apply manifest.pp   
Notice: Compiled catalog for kchejzi5z568vxr.delivery.puppetlabs.net in environment production in 0.42 seconds
Notice: /Stage[main]/Main/Mount[/pl21474]/ensure: defined 'ensure' as 'mounted'
Error: /Stage[main]/Main/Mount[/pl21474]: Could not evaluate: Execution of '/bin/mount /pl21474' returned 2: mount: Could not find any loop device. Maybe this kernel does not know
       about the loop device? (If so, recompile or `modprobe loop'.)
Notice: Applied catalog in 0.07 seconds