diff --git a/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php b/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
index 1f597c285a..00f6a40f2e 100644
--- a/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
+++ b/src/Symfony/Bridge/Doctrine/DependencyInjection/AbstractDoctrineExtension.php
@@ -309,7 +309,7 @@ abstract class AbstractDoctrineExtension extends Extension
                 $memcacheClass = !empty($cacheDriver['class']) ? $cacheDriver['class'] : '%'.$this->getObjectManagerElementName('cache.memcache.class').'%';
                 $memcacheInstanceClass = !empty($cacheDriver['instance_class']) ? $cacheDriver['instance_class'] : '%'.$this->getObjectManagerElementName('cache.memcache_instance.class').'%';
                 $memcacheHost = !empty($cacheDriver['host']) ? $cacheDriver['host'] : '%'.$this->getObjectManagerElementName('cache.memcache_host').'%';
-                $memcachePort = !empty($cacheDriver['port']) ? $cacheDriver['port'] : '%'.$this->getObjectManagerElementName('cache.memcache_port').'%';
+                $memcachePort = !empty($cacheDriver['port']) || (isset($cacheDriver['port']) && $cacheDriver['port'] === 0)  ? $cacheDriver['port'] : '%'.$this->getObjectManagerElementName('cache.memcache_port').'%';
                 $cacheDef = new Definition($memcacheClass);
                 $memcacheInstance = new Definition($memcacheInstanceClass);
                 $memcacheInstance->addMethodCall('connect', array(