diff --git a/ryu/lib/hub.py b/ryu/lib/hub.py
index ea935b7b..44e5feaa 100644
--- a/ryu/lib/hub.py
+++ b/ryu/lib/hub.py
@@ -120,3 +120,5 @@ if HUB_TYPE == 'eventlet':
                         self._wait()
                 except Timeout:
                     pass
+
+            return self._cond