diff --git a/src/runtime/error.rs b/src/runtime/error.rs
index c21fa7b9801fbbb80fa7542541210a70c5fa3a2f..16322977191072c35e6259929d78cf68be9fb515 100644
--- a/src/runtime/error.rs
+++ b/src/runtime/error.rs
@@ -3,6 +3,7 @@ use crate::common::*;
 #[derive(Debug)]
 pub enum ConnectError {
     BindFailed(SocketAddr),
+    UdpConnectFailed(SocketAddr),
     PollInitFailed,
     Timeout,
     PollFailed,