Index: wp-admin/edit-form-advanced.php
===================================================================
--- wp-admin/edit-form-advanced.php	(revision 23974)
+++ wp-admin/edit-form-advanced.php	(working copy)
@@ -172,6 +172,9 @@
 			'description' => __( 'An aside is a quick thought or side topic. Use the editor to compose one.' )
 		)
 	);
+
+	$all_post_formats = apply_filters( 'all_post_formats', $all_post_formats );
+
 	$post_format_options = '';
 
 	foreach ( $all_post_formats as $slug => $attr ) {