diff --git a/wp-admin/includes/meta-boxes.php b/wp-admin/includes/meta-boxes.php
index 932066c553..796efe7540 100644
--- a/wp-admin/includes/meta-boxes.php
+++ b/wp-admin/includes/meta-boxes.php
@@ -1030,7 +1030,7 @@ function post_thumbnail_meta_box( $post ) {
 		};
 
 		$element.on( 'click', '.choose, img', function( event ) {
-			var options, thumbnailId;
+			var options, thumbnailId, attachment;
 
 			event.preventDefault();
 
@@ -1047,8 +1047,11 @@ function post_thumbnail_meta_box( $post ) {
 			};
 
 			thumbnailId = $thumbnailId.val();
-			if ( '' !== thumbnailId && -1 !== thumbnailId )
-				options.selection = [ Attachment.get( thumbnailId ) ];
+			if ( '' !== thumbnailId && -1 !== thumbnailId ) {
+				attachment = Attachment.get( thumbnailId );
+				attachment.fetch();
+				options.selection = [ attachment ];
+			}
 
 			frame = wp.media( options );