diff --git a/src/Symfony/Component/HttpFoundation/SessionStorage/PdoSessionStorage.php b/src/Symfony/Component/HttpFoundation/SessionStorage/PdoSessionStorage.php
index 78f90b8ec956..c899459ea8f6 100644
--- a/src/Symfony/Component/HttpFoundation/SessionStorage/PdoSessionStorage.php
+++ b/src/Symfony/Component/HttpFoundation/SessionStorage/PdoSessionStorage.php
@@ -68,6 +68,14 @@ public function start()
             array($this, 'sessionGC')
         );
 
+        // use to prevent the sessions database from growing endlessly
+        // if session.gc_probability is on 0 (like Debian system)
+        if ((int) ini_get('session.gc_probability') <= 0) {
+            if (rand(1, ini_get('session.gc_divisor') + 1) === 1) {
+                $this->sessionGC($this->options['lifetime']);
+            }
+        }
+
         parent::start();
     }