diff --git a/chain/bitcoind_conn.go b/chain/bitcoind_conn.go
index 9c1f1e3c78..33b4f0e9e2 100644
--- a/chain/bitcoind_conn.go
+++ b/chain/bitcoind_conn.go
@@ -238,7 +238,8 @@ func (c *BitcoindConn) Stop() {
 	if !atomic.CompareAndSwapInt32(&c.stopped, 0, 1) {
 		return
 	}
-
+	c.subscriptionsMtx.Lock()
+	defer c.subscriptionsMtx.Unlock()
 	for subscription := range c.subscriptions {
 		close(subscription.txNtfns)
 		close(subscription.blockNtfns)