diff --git a/gunicorn/arbiter.py b/gunicorn/arbiter.py
index 9c223a71..14b83669 100644
--- a/gunicorn/arbiter.py
+++ b/gunicorn/arbiter.py
@@ -307,7 +307,7 @@ class Arbiter(object):
             except ValueError:
                 continue
 
-            self.log.error("Worker timed out: %s (pid:%s)" % (worker, pid))
+            self.log.error("Worker timed out (pid:%s)" % pid)
             self.kill_worker(pid, signal.SIGKILL)
     
     def reap_workers(self):