diff --git a/eventlet/proc.py b/eventlet/proc.py
index 724888b..4c00eea 100644
--- a/eventlet/proc.py
+++ b/eventlet/proc.py
@@ -168,8 +168,9 @@ class LinkToCallable(Link):
         self.listener(source)
 
 
-def waitall(lst, trap_errors=False):
-    queue = coros.queue()
+def waitall(lst, trap_errors=False, queue=None):
+    if queue is None:
+        queue = coros.queue()
     index = -1
     for (index, linkable) in enumerate(lst):
         linkable.link(decorate_send(queue, index))