SUPEE-9767 : EE FPC add to cart patch

gistfile1.txt

 app/code/core/Enterprise/PageCache/Model/Cookie.php   | 1 +
 app/code/core/Enterprise/PageCache/Model/Observer.php | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/code/core/Enterprise/PageCache/Model/Cookie.php b/app/code/core/Enterprise/PageCache/Model/Cookie.php
index 8d6ef605c5..9979b763f3 100644
--- a/app/code/core/Enterprise/PageCache/Model/Cookie.php
+++ b/app/code/core/Enterprise/PageCache/Model/Cookie.php
@@ -258,6 +258,7 @@ public static function getCategoryViewedCookieValue($id)
     public static function setFormKeyCookieValue($formKey)
     {
         setcookie(self::COOKIE_FORM_KEY, $formKey, 0, '/');
+        $_COOKIE[self::COOKIE_FORM_KEY] = $formKey;
     }
 
     /**
diff --git a/app/code/core/Enterprise/PageCache/Model/Observer.php b/app/code/core/Enterprise/PageCache/Model/Observer.php
index 1bf219a557..ab0c02f9a7 100755
--- a/app/code/core/Enterprise/PageCache/Model/Observer.php
+++ b/app/code/core/Enterprise/PageCache/Model/Observer.php
@@ -1041,7 +1041,7 @@ public function registerCachedFormKey(Varien_Event_Observer $observer)
         /** @var $session Mage_Core_Model_Session  */
         $session = Mage::getSingleton('core/session');
         $cachedFrontFormKey = Enterprise_PageCache_Model_Cookie::getFormKeyCookieValue();
-        if ($cachedFrontFormKey && !$session->getData('_form_key')) {
+        if ($cachedFrontFormKey) {
             Mage::getSingleton('core/session')->setData('_form_key', $cachedFrontFormKey);
         }
     }