client.go | 1 +

diff --git a/client.go b/client.go
index f2a5d77d3e789c28e2d6beab32585bab113d4d0f..2b0b6d155c25dbc644a0e0645ef05e008a225ed3 100644
--- a/client.go
+++ b/client.go
@@ -439,6 +439,7 @@ }
 
 func (c *Client) Start() {
 	c.mu = &c.Mutex
+	c.event.L = c.mu
 	c.torrents = make(map[InfoHash]*Torrent)
 	if c.HalfOpenLimit == 0 {
 		c.HalfOpenLimit = 10