diff --git a/app/code/core/Mage/Core/Model/App.php b/app/code/core/Mage/Core/Model/App.php
index c8393e2e8a92f..95169643cb734 100644
--- a/app/code/core/Mage/Core/Model/App.php
+++ b/app/code/core/Mage/Core/Model/App.php
@@ -736,6 +736,7 @@ public function reinitStores()
      */
     protected function _initStores()
     {
+        $this->_store    = null;
         $this->_stores   = array();
         $this->_groups   = array();
         $this->_website  = null;