diff --git a/lib/mysql.js b/lib/mysql.js
index 928bab3..2143857 100644
--- a/lib/mysql.js
+++ b/lib/mysql.js
@@ -692,6 +692,7 @@ MySQL.prototype.createTable = function (model, cb) {
  */
 MySQL.prototype.isActual = function(models, cb) {
   var self = this;
+  var ok = false;
 
   if ((!cb) && ('function' === typeof models)) {
     cb = models;