diff --git a/src/Symfony/Component/HttpKernel/HttpCache/Store.php b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
index 4901e2cf29..15a956d4d4 100644
--- a/src/Symfony/Component/HttpKernel/HttpCache/Store.php
+++ b/src/Symfony/Component/HttpKernel/HttpCache/Store.php
@@ -106,7 +106,10 @@ class Store implements StoreInterface
 
     public function isLocked(Request $request)
     {
-        return is_file($this->getPath($this->getCacheKey($request).'.lck'));
+        $path = $this->getPath($this->getCacheKey($request).'.lck');
+        clearstatcache(true, $path);
+
+        return is_file($path);
     }
 
     /**