Index: wp-admin/custom-background.php
===================================================================
--- wp-admin/custom-background.php	(revision 22265)
+++ wp-admin/custom-background.php	(working copy)
@@ -337,7 +337,7 @@
 </tr>
 </tbody>
 </table>
-
+<?php do_action( 'custom_background_options' ); ?>
 <?php wp_nonce_field('custom-background'); ?>
 <?php submit_button( null, 'primary', 'save-background-options' ); ?>
 </form>