diff --git a/cluster.go b/cluster.go
index 76bdb2b..19e3a96 100644
--- a/cluster.go
+++ b/cluster.go
@@ -16,9 +16,9 @@ type ClusterConnector struct {
 	subs map[string]*nats.Subscription
 }
 
-func NewClusterConnector(servers string, ssl bool) *ClusterConnector {
+func NewClusterConnector(urls string, ssl bool) *ClusterConnector {
 	opts := nats.DefaultOptions
-	opts.Servers = strings.Split(servers, ",")
+	opts.Servers = strings.Split(urls, ",")
 	for i, s := range opts.Servers {
 		opts.Servers[i] = strings.Trim(s, " ")
 	}
@@ -32,6 +32,9 @@ func NewClusterConnector(servers string, ssl bool) *ClusterConnector {
 }
 
 func (cc *ClusterConnector) Subscribe(subj string, ch chan *irc.Message) {
+	if cc.conn == nil {
+		return
+	}
 	if _, exists := cc.subs[subj]; exists {
 		return
 	}
@@ -47,6 +50,9 @@ func (cc *ClusterConnector) Subscribe(subj string, ch chan *irc.Message) {
 }
 
 func (cc *ClusterConnector) Unsubscribe(subj string) {
+	if cc.conn == nil {
+		return
+	}
 	if sub, exists := cc.subs[subj]; exists {
 		sub.Unsubscribe()
 		delete(cc.subs, subj)
@@ -54,6 +60,9 @@ func (cc *ClusterConnector) Unsubscribe(subj string) {
 }
 
 func (cc *ClusterConnector) Publish(msg *irc.Message) {
+	if cc.conn == nil {
+		return
+	}
 	subj := strings.ToLower(msg.Args[0])
 	cc.conn.Publish(subj, []byte(msg.String()))
 }