diff --git a/src/Symfony/Bridge/Doctrine/CacheWarmer/ProxyCacheWarmer.php b/src/Symfony/Bridge/Doctrine/CacheWarmer/ProxyCacheWarmer.php
index 24cf25be59f3d..08f9fef880e51 100644
--- a/src/Symfony/Bridge/Doctrine/CacheWarmer/ProxyCacheWarmer.php
+++ b/src/Symfony/Bridge/Doctrine/CacheWarmer/ProxyCacheWarmer.php
@@ -49,7 +49,7 @@ public function warmUp($cacheDir)
         foreach ($this->registry->getManagers() as $em) {
             // we need the directory no matter the proxy cache generation strategy
             if (!is_dir($proxyCacheDir = $em->getConfiguration()->getProxyDir())) {
-                if (false === @mkdir($proxyCacheDir, 0777, true)) {
+                if (false === @mkdir($proxyCacheDir, 0777, true) && !is_dir($proxyCacheDir)) {
                     throw new \RuntimeException(sprintf('Unable to create the Doctrine Proxy directory "%s".', $proxyCacheDir));
                 }
             } elseif (!is_writable($proxyCacheDir)) {