diff --git a/grattoir/__init__.py b/grattoir/__init__.py
index e97b6dd..0556da0 100644
--- a/grattoir/__init__.py
+++ b/grattoir/__init__.py
@@ -26,6 +26,7 @@ class Grattoir(object):
         self._driver = None
 
     def __enter__(self):
+        self._driver = None
         p_path = tor_profile()
         profile = firefox.firefox_profile.FirefoxProfile(profile_directory=p_path)
         b_path = tor_browser_binary_path()