Index: wp-admin/includes/class-wp-media-list-table.php
===================================================================
--- wp-admin/includes/class-wp-media-list-table.php	(revision 24394)
+++ wp-admin/includes/class-wp-media-list-table.php	(working copy)
@@ -377,7 +377,7 @@
 		}
 ?>
 		<td <?php echo $attributes ?>>
-			<?php do_action( 'manage_media_custom_column', $column_name, $id ); ?>
+			<?php do_action( 'manage_media_custom_column', $column_name, $post->ID ); ?>
 		</td>
 <?php
 		break;