diff --git a/route/route.go b/route/route.go
index d7894c6f1a..9828efd32c 100644
--- a/route/route.go
+++ b/route/route.go
@@ -726,6 +726,7 @@ func (r *Router) actionSniff(
 			case <-done:
 			case <-ctx.Done():
 				inputPacketConn.Close()
+				<-done
 				fatalErr = ctx.Err()
 				return
 			}