diff --git a/gunicorn/workers/gthread.py b/gunicorn/workers/gthread.py
index 0d2272f2..fb3830d4 100644
--- a/gunicorn/workers/gthread.py
+++ b/gunicorn/workers/gthread.py
@@ -208,7 +208,10 @@ class ThreadWorker(base.Worker):
             # can we accept more connections?
             if self.nr_conns < self.worker_connections:
                 # wait for an event
-                events = self.poller.select(1.0)
+                select_timeout = self.timeout or 1.0
+                if self._keep:
+                    select_timeout = min(select_timeout, self.cfg.keepalive)
+                events = self.poller.select(select_timeout)
                 for key, _ in events:
                     callback = key.data
                     callback(key.fileobj)