diff --git a/src/wormhole/_boss.py b/src/wormhole/_boss.py
index 686335f..373c0f4 100644
--- a/src/wormhole/_boss.py
+++ b/src/wormhole/_boss.py
@@ -38,6 +38,8 @@ class Boss(object):
     _versions = attrib(validator=instance_of(dict))
     _client_version = attrib(validator=instance_of(tuple))
     _reactor = attrib()
+    _eventual_queue = attrib()
+    _cooperator = attrib()
     _journal = attrib(validator=provides(_interfaces.IJournal))
     _tor = attrib(validator=optional(provides(_interfaces.ITorManager)))
     _timing = attrib(validator=provides(_interfaces.ITiming))
diff --git a/src/wormhole/test/test_machines.py b/src/wormhole/test/test_machines.py
index 8a17b76..5b5e9f1 100644
--- a/src/wormhole/test/test_machines.py
+++ b/src/wormhole/test/test_machines.py
@@ -1286,11 +1286,14 @@ class Boss(unittest.TestCase):
                          "closed")
         versions = {"app": "version1"}
         reactor = None
+        eq = None
+        cooperator = None
         journal = ImmediateJournal()
         tor_manager = None
         client_version = ("python", __version__)
         b = MockBoss(wormhole, "side", "url", "appid", versions,
-                     client_version, reactor, journal, tor_manager,
+                     client_version, reactor, eq, cooperator, journal,
+                     tor_manager,
                      timing.DebugTiming())
         b._T = Dummy("t", events, ITerminator, "close")
         b._S = Dummy("s", events, ISend, "send")
diff --git a/src/wormhole/wormhole.py b/src/wormhole/wormhole.py
index 610069c..c02aa60 100644
--- a/src/wormhole/wormhole.py
+++ b/src/wormhole/wormhole.py
@@ -5,6 +5,7 @@ import sys
 
 from attr import attrib, attrs
 from twisted.python import failure
+from twisted.internet.task import Cooperator
 from zope.interface import implementer
 
 from ._boss import Boss
@@ -122,7 +123,8 @@ class _DelegatedWormhole(object):
 
 @implementer(IWormhole, IDeferredWormhole)
 class _DeferredWormhole(object):
-    def __init__(self, eq):
+    def __init__(self, reactor, eq):
+        self._reactor = reactor
         self._welcome_observer = OneShotObserver(eq)
         self._code_observer = OneShotObserver(eq)
         self._key = None
@@ -258,10 +260,11 @@ def create(
     side = bytes_to_hexstr(os.urandom(5))
     journal = journal or ImmediateJournal()
     eq = _eventual_queue or EventualQueue(reactor)
+    cooperator = Cooperator(scheduler=eq.eventually)
     if delegate:
         w = _DelegatedWormhole(delegate)
     else:
-        w = _DeferredWormhole(eq)
+        w = _DeferredWormhole(reactor, eq)
     wormhole_versions = {}  # will be used to indicate Wormhole capabilities
     wormhole_versions["app_versions"] = versions  # app-specific capabilities
     v = __version__
@@ -269,7 +272,7 @@ def create(
         v = v.decode("utf-8", errors="replace")
     client_version = ("python", v)
     b = Boss(w, side, relay_url, appid, wormhole_versions, client_version,
-             reactor, journal, tor, timing)
+             reactor, eq, cooperator, journal, tor, timing)
     w._set_boss(b)
     b.start()
     return w