diff --git a/wp-includes/wp-db.php b/wp-includes/wp-db.php
index 335fd01eec..8d2573a794 100644
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -222,7 +222,7 @@ class wpdb {
 	//	Basic Query	- see docs for more detail
 
 	function query($query) {
-		if ( ! $ready )
+		if ( ! $this->ready )
 			return false;
 
 		// filter the query, if filters are available