diff --git a/wp-admin/media.php b/wp-admin/media.php
index 5381865c2a..15d4323876 100644
--- a/wp-admin/media.php
+++ b/wp-admin/media.php
@@ -59,6 +59,7 @@ case 'edit' :
 	$att = get_post($att_id);
 
 	if ( empty($att->ID) ) wp_die( __('You attempted to edit an attachment that doesn’t exist. Perhaps it was deleted?') );
+	if ( 'attachment' !== $att->post_type ) wp_die( __('You attempted to edit an item that isn’t an attachment. Please go back and try again.') );
 	if ( $att->post_status == 'trash' ) wp_die( __('You can’t edit this attachment because it is in the Trash. Please move it out of the Trash and try again.') );
 
 	add_filter('attachment_fields_to_edit', 'media_single_attachment_fields_to_edit', 10, 2);