webtorrent/tracker_client.go | 2 ++

diff --git a/webtorrent/tracker_client.go b/webtorrent/tracker_client.go
index 39a7e347b00e715f49c4b2986bf4cffb758efddb..5af6c7c0df74a522614f47b949d629a749c707c3 100644
--- a/webtorrent/tracker_client.go
+++ b/webtorrent/tracker_client.go
@@ -92,9 +92,11 @@ 	for !tc.closed {
 		tc.mu.Unlock()
 		err := tc.doWebsocket()
 		level := log.Info
+		tc.mu.Lock()
 		if tc.closed {
 			level = log.Debug
 		}
+		tc.mu.Unlock()
 		tc.Logger.WithDefaultLevel(level).Printf("websocket instance ended: %v", err)
 		time.Sleep(time.Minute)
 		tc.mu.Lock()