diff --git a/flask/signals.py b/flask/signals.py
index a7e459af..17de0447 100644
--- a/flask/signals.py
+++ b/flask/signals.py
@@ -13,7 +13,6 @@ signals_available = False
 try:
     from blinker import Namespace
     signals_available = True
-    _signals = Namespace()
 except ImportError:
     class Namespace(object):
         def signal(self, name, doc=None):