diff --git a/wp-admin/admin-ajax.php b/wp-admin/admin-ajax.php
index 2dea874b37..e0bf8d2651 100644
--- a/wp-admin/admin-ajax.php
+++ b/wp-admin/admin-ajax.php
@@ -388,6 +388,7 @@ case 'autosave' : // The name of this action is hardcoded in edit_post()
 	$_POST['post_excerpt'] = $_POST['excerpt'];
 	$_POST['post_status'] = 'draft';
 	$_POST['post_category'] = explode(",", $_POST['catslist']);
+	$_POST['tags_input'] = explode(",", $_POST['tags_input']);
 	if($_POST['post_type'] == 'page' || empty($_POST['post_category']))
 		unset($_POST['post_category']);
 
diff --git a/wp-includes/js/autosave.js b/wp-includes/js/autosave.js
index ae2c10545d..c8956ae4f9 100644
--- a/wp-includes/js/autosave.js
+++ b/wp-includes/js/autosave.js
@@ -131,6 +131,7 @@ function autosave() {
 	autosaveAjax.setVar("post_ID", $("post_ID").value);
 	autosaveAjax.setVar("post_title", form.post_title.value);
 	autosaveAjax.setVar("post_type", form.post_type.value);
+	autosaveAjax.setVar("tags_input", form.tags_input.value);
 	if ( form.comment_status.checked )
 		autosaveAjax.setVar("comment_status", 'open');
 	if ( form.ping_status.checked )