diff --git a/wp-includes/media.php b/wp-includes/media.php
index 7f735577c9..0d9b3708c6 100644
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -801,6 +801,7 @@ function gallery_shortcode($attr) {
 		'captiontag' => 'dd',
 		'columns'    => 3,
 		'size'       => 'thumbnail',
+		'ids'        => '',
 		'include'    => '',
 		'exclude'    => ''
 	), $attr));
@@ -809,6 +810,12 @@ function gallery_shortcode($attr) {
 	if ( 'RAND' == $order )
 		$orderby = 'none';
 
+	if ( !empty( $ids ) ) {
+		// 'ids' is explicitly ordered
+		$orderby = 'post__in';
+		$include = $ids;
+	}
+
 	if ( !empty($include) ) {
 		$include = preg_replace( '/[^0-9,]+/', '', $include );
 		$_attachments = get_posts( array('include' => $include, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => $order, 'orderby' => $orderby) );