diff --git a/app/code/core/Mage/Core/etc/config.xml b/app/code/core/Mage/Core/etc/config.xml
index 751b177b995..9eeb52e6680 100644
--- a/app/code/core/Mage/Core/etc/config.xml
+++ b/app/code/core/Mage/Core/etc/config.xml
@@ -416,6 +416,7 @@
                 <domain_policy_backend>2</domain_policy_backend>
                 <domain_policy_frontend>2</domain_policy_frontend>
                 <extensions_compatibility_mode>1</extensions_compatibility_mode>
+                <session_cookie_lifetime>10800</session_cookie_lifetime>
             </security>
         </admin>
         <general>