diff --git wp-admin/includes/upgrade.php wp-admin/includes/upgrade.php
index 531d21f..4f9f338 100644
--- wp-admin/includes/upgrade.php
+++ wp-admin/includes/upgrade.php
@@ -433,7 +433,7 @@ function upgrade_100() {
 	foreach ($categories as $category) {
 		if ('' == $category->category_nicename) {
 			$newtitle = sanitize_title($category->cat_name);
-			$wpdb>update( $wpdb->categories, array('category_nicename' => $newtitle), array('cat_ID' => $category->cat_ID) );
+			$wpdb->update( $wpdb->categories, array('category_nicename' => $newtitle), array('cat_ID' => $category->cat_ID) );
 		}
 	}