diff --git a/listener.go b/listener.go
index 08896e7..d1a3643 100644
--- a/listener.go
+++ b/listener.go
@@ -68,9 +68,11 @@ func (sh *SyncHandler) Handle(e Event) {
 		_, ok := sh.chanForSync[device.IfaceName]
 		if ok {
 			close(sh.chanForSync[device.IfaceName])
+			delete(sh.chanForSync, device.IfaceName)
 		}
 		chanForSync := make(chan map[string]interface{})
 		sh.chanForSync[device.IfaceName] = make(chan map[string]interface{})
+
 		for state := range chanForSync {
 
 			if compareMap(origin, state) {
@@ -82,6 +84,7 @@ func (sh *SyncHandler) Handle(e Event) {
 			log.Println("resend: ", origin)
 			err := encoder.Encode(origin)
 			if err != nil {
+				log.Println("sync routine is died")
 				return
 			}
 		}