diff --git a/gunicorn/workers/geventlet.py b/gunicorn/workers/geventlet.py
index 948257b1..cc4df058 100644
--- a/gunicorn/workers/geventlet.py
+++ b/gunicorn/workers/geventlet.py
@@ -30,7 +30,7 @@ class EventletWorker(AsyncWorker):
         super(EventletWorker, self).init_process()
 
     def timeout_ctx(self):
-        return eventlet.Timeout(self.cfg.keepalive, False)
+        return eventlet.Timeout(self.cfg.keepalive or None, False)
 
     def run(self):
         self.socket = GreenSocket(family_or_realsock=self.socket.sock)