diff --git a/src/Symfony/Bundle/DoctrineBundle/DoctrineBundle.php b/src/Symfony/Bundle/DoctrineBundle/DoctrineBundle.php
index ad1384bb92..4608e2d60e 100644
--- a/src/Symfony/Bundle/DoctrineBundle/DoctrineBundle.php
+++ b/src/Symfony/Bundle/DoctrineBundle/DoctrineBundle.php
@@ -79,13 +79,11 @@ class DoctrineBundle extends Bundle
                         }
 
                         clearstatcache($file);
-
-                        if (!file_exists($file)) {
-                            throw new \RuntimeException(sprintf('The proxy file "%s" does not exist. If you still have objects serialized in the session, you need to clear the session manually.', $file));
-                        }
                     }
 
-                    require $file;
+                    if (file_exists($file)) {
+                        require $file;
+                    }
                 }
             };
             spl_autoload_register($this->autoloader);