diff --git a/gunicorn/arbiter.py b/gunicorn/arbiter.py
index f7ce1912..ddf32f75 100644
--- a/gunicorn/arbiter.py
+++ b/gunicorn/arbiter.py
@@ -97,7 +97,7 @@ class Arbiter(object):
             self.pidfile.create(self.pid)
         self.log.info("Arbiter booted")
         self.log.info("Listening at: %s" % self.LISTENER)
-        
+        self.cfg.when_ready(self)
     
     def init_signals(self):
         """\
diff --git a/gunicorn/config.py b/gunicorn/config.py
index aa306dc3..6febbe24 100644
--- a/gunicorn/config.py
+++ b/gunicorn/config.py
@@ -536,3 +536,17 @@ with Setting("pre_exec") as s:
         
         The callable needs to accept a single instance variable for the Arbiter.
         """)
+        
+
+with Setting("when_ready") as s:
+    s.section = "Server Hooks"
+    s.validator = validate_callable(1)
+    s.type = "callable"
+    def def_start_server(server):
+        pass
+    s.default = def_start_server
+    s.fmt_desc("""\
+        Called just after the server is started
+        
+        The callable needs to accept a single instance variable for the Arbiter.
+        """)