client.go | 3 +++

diff --git a/client.go b/client.go
index 142213c08934cfc66c70d07df57b37777f060709..b4d3f17a7e439bd1048ea85940de851c10755e62 100644
--- a/client.go
+++ b/client.go
@@ -980,6 +980,9 @@
 func (c *Peer) updateRequestsTimerFunc() {
 	c.locker().Lock()
 	defer c.locker().Unlock()
+	if c.closed.IsSet() {
+		return
+	}
 	if c.needRequestUpdate != "" {
 		return
 	}