diff --git a/ChangeLog b/ChangeLog
index 894700f..fbb2568 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,7 @@
-0.9
+0.9:
+  - Allow providing a non-standard (eventlet or
+    other condition class) to the r/w lock for
+    cases where it is useful to do so.
 0.8:
   - Add fastener logo (from openclipart).
   - Ensure r/w writer -> reader -> writer
diff --git a/fasteners/lock.py b/fasteners/lock.py
index f9969dc..fe95181 100644
--- a/fasteners/lock.py
+++ b/fasteners/lock.py
@@ -132,11 +132,12 @@ class ReaderWriterLock(object):
                 return eventlet.getcurrent
         return threading.current_thread
 
-    def __init__(self, find_eventlet=True):
+    def __init__(self, find_eventlet=True,
+                 condition_cls=threading.Condition):
         self._writer = None
         self._pending_writers = collections.deque()
         self._readers = collections.deque()
-        self._cond = threading.Condition()
+        self._cond = condition_cls()
         self._current_thread = self._fetch_current_thread_functor(
             find_eventlet=find_eventlet)